Trailer Lights Troubleshooting Running Lights

Many lights ground electrically to the trailer frame through the mounting hardware, and an improper or “bad” ground is a common cause for lights not working. I did plug in my trailer and oddly the trailer lights. Green = right turn, yellow = left turn, red = brake, and brown = taillights. you may also have a bad wire on your trailer going to the tail lights. You may be a technician that wishes to look for references or solve existing problems. Below is a table showing our class schedules for courses taught in the United States and Canada. You need to check the running light pin on your 7-wire plug first. http://www. Bulb test: As the engine is started, all the lights should glow for approx. Brand loyalty only goes so far. The one problem with most of these kits and prewired installations is that they leave the truck wiring and electrical components vulnerable to problems caused by short circuits, and in many cases the factory truck wiring is barely adequate for running the truck taillights, let alone additional trailer lights. light just no. I use an adapter for hooking to a 4-straight-lead trailer, and when plugged in, the turn signals and brake lights work on the trailer, but not the running lights on the trailer. If you haven't had the trailer on for some time you may not be getting a good ground. Not sure where to post this topic so here goes. Strange Trailer Problems It's very difficult to get people to check the ground connections, even though most trailer problems are probably caused by bad grounds. Trailer running lights/fuse question Does anyone know what fuse would affect trailer running lights? Been chasing an electrical problem and it looks like the 4Runner plug isn't putting power to the running lights pin but can't figure out which fuse corresponds to it. I have no power at the Envoy 7-pin plug for running lights. The running/parking lights on my trailer won't work, but the brakes and all other lights do. All the lights on my truck work including the lience plate lights. The tail lights are different from the turn/stop lights and the tail lights are all wired to the same circuit as the rest of the running lights. Gas water heater heating problems are typically: 1) No hot water at all; 2) not enough hot water; or 3) the water heater’s pilot light does not stay lit. No marker lights or tail lights screams fuse. I have connected a friends Titan to the trailer and all the trailer lights work. But I know my trailer is getting power because my signal, break lights and flashers are working on. (Photo: Tux Turkel) If your boat's on a trailer — especially an aging one — chances are you have light problems. This kit converts the lights on your 2015+ style GM tow mirrors from signal only to dual function running light and turn signal. So I break out the test light go to the 7pin and see where im getting power and where im not. Support and troubleshooting EMC RepliStor, the software Data Replication solution on Windows platform, most of the problems are Replication performance on WAN, finding out the bottleneck is the key Support and troubleshooting EMC Backup Advisor (new name EMC Data Protection Advisor), the Performance Measurement & Monitoring/Reporting system. It has to be the plug !! Right ?? Well, it could be the plug, adapter, fuse, other connection. 06 volts on inside lights that don’t work Also if u take light out while light on and put back in wont come on unless u turn lights off to reset and back on Any help would be great. It's the factory hitch/harness. Ive got an 07 with flat 4 pin harness. Also, you will find excellent wiring diagrams for all makes, years and models of VWs at VW Wiring Diagrams. The approach for you depends on your electrical needs. Beautifully for several years, and suddenly my Trailer Running Lights do not Work while towing my boat. Free shipping on many items | Browse your favorite brands. Whether you need a trailer hitch to pull your jet-skis, or a gooseneck to haul your RV, we have everything you need under one roof here. I can get all appliances and lights to work when Im plugged in, but not when its unplugged. To do so, you will need to check the connector and wiring from the vehicle to the trailer. Both side running lights and left tail light go on. Keep in mind that any rv furnace repair should be done by a qualified technician. Thought I would run it by you guys before I call him tomorrow. I have an adapter with test LEDs and everything seems fine (indicator shows when running lights on, left and right turn, etc). Re: How to troubleshoot a trailer wiring module Did a lot of looking and checking and found some unusual things The power wire from the battery terminal to the trailer lights was loose, had a new battery installed by sears, guess they forgot to tighten that connection, but the power was going to the trailer anyway. 3rd Gen Ram Tech - Trailer light problems - I have a new to me 2006 2500 Cummins and have discovered the first time I hooked up the boat trailer lights, the right turn signal and right running lights do not work. Sidelights, used to make other drivers aware of the trailer's presence and denote its length, must be placed in the same location on both sides of the vehicle. take a 12v tester and see if your getting juice to the plug from your truck. Plug in the 4 flat from trailer and i get NOTHING!! Plug trailer into 4 flat on my 75 Ford F-250 and trailer lights work like a charm!. In addition, the available Dynamic Hitch Assist provides a line-of-sight guide to help direct your hitch ball to the trailer coupler. We plugged the harness into a ford and the running lights worked. This includes the side markers and the light bar below the stern of the boat. To provide our customers with the maximum value in vehicle lighting, mirrors and other related safety products and accessories through a commitment to continuously improve quality, cost, and service. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. We assume the lights in the hall and bathroom are running off of 12-volt, and that other lights in the RV are working fine. A 12-volt DC system powers the RV refrigerator to keep food cold while the RV or camper trailer is moving from place to place. The right side works fine, and the front lights work fine. The Blazer LED submersible square trailer light kit is designed to conform to applicable US FMVSS108 and Canadian CMVSS safety standards for trailers under 80 In. Lights manufactured by LED Autolamps are not only IP67 rated, but also submersible up to 1 meter. The brake lights on my trailer are not working when hooked up to my vehicle, but the turn signals do work. “If your furnace has a pilot light—anything less than 20 years old won’t—there are instructions in your owner’s manual for how to relight the pilot,” says Bonner. Read on for a fix to your particular issue. It works great and lights did work when i bought it used. I have checked and re-checked each fuse for the tail lights with a DMM. , makes this a quick and easy solution to stay safe and have lights on the road. The running lights come on for a second then off. When you energize the circuit, the trailer’s running lights should come on. utility truck) first appeared, and culminate in an introduction to the world of truck accessories and SUV accessories; additions to your vehicle that will enhance its performance, appearance, and longevityjust like a. Hi Alan, I don't think the trailer has a fuse or circuit breaker on the wiring to the running lights/tail lights. Learn about this problem, why it occurs, and how to fix it. Keep your truck DOT compliant and make sure traffic behind you is aware of your vehicle. Just remember that building a trailer is not necessarily the cheapest option and can, depending on the options you put into your trailer, be more expensive than buying a new trailer from your local manufacturer - BUT - there is almost nothing in the world better than driving down the road towing a trailer that you have crafted using your own. I blew a fuse troubleshooting my trailer lights while hooked up yesterday- oops! I looked in the owners' manual and online and listed about 17 possible fuses under the hood and inside the cab. Trailer running lights/fuse question Does anyone know what fuse would affect trailer running lights? Been chasing an electrical problem and it looks like the 4Runner plug isn't putting power to the running lights pin but can't figure out which fuse corresponds to it. Lights do cycle back on for a split second and blink back off seeming like an overload. Enjoy the most wonderful time of the year at Kennywood! Holiday Lights turns Pittsburgh's playground into a winter wonderland with specialty themed rides and entertainment beginning Friday, November 22. I assumed it was the pop-up. The style of the Elite i20 follows the "Fluidic Sculpture 2. See if the lights light. My running lights do not work, I checked the 7way connector and there is no power from truck, does anyone know what fuse or relay may control this?. It was introduced as a replacement for the Ford Bronco II. BoatUS Magazine associate editor Charles Fort walks you through the steps necessary to identify, troubleshoot, and fix boat trailer light problems. Check the connections by removing the light assembly. I have a flat 4 pin connector on my truck and I used a 4 pin connector harness with leds to test functions. Big Cree Single Row LED Light Bar – 44 Inch 240 Watt – Spot Sale! $ 369. Corrosion erodes the electrical contacts. No marker lights or tail lights screams fuse. Ongoing discussions of turn signal flasher problems and dim tail lights brought me to post this page about trailer tail lights. Can't figure out why the fuse keeps blowing. The trailer running lights stopped working when hooked up my 2011 Silverado, however, the brake lights and turn signals are working fine. I went out to turn them off and even though the lights were on, the light switch was in the off position. Anyway, my trailer lights do not turn off and on with the tow vehicle head lights. ok so the right tail light on the trailer stays on all the time, even when the truck is turned off, sometimes it works but not often, the truck is a Jeep grand cherokee, with aftermarket towing and lighting setup. Two of the wires are the running light circuit which is a little easier to install since you can run one down each side of the trailer. I put the headlights on, high beams on, headlights on auto, etc. I installed a brand new wiring kit (new lights and wires) due to multiple splices and it just looked like the old one was in bad shape. Turn on the vehicle headlights, and use a circuit tester like part # 40376 on the pin on the trailer connector that feeds the running light circuit. All fuses look Trailer Lights Debacle. Pilot Light Won't light or stay lit. The right turn relay isn't replaceable. My running lights do not work, I checked the 7way connector and there is no power from truck, does anyone know what fuse or relay may control this?. Good luck, George. The Wedge base bulb is one of the most common used in RV and Trailers. Wiring issues can be frustrating and time consuming to fix, especially when you are not sure where to begin troubleshooting. 50 FREE In Store Pick Up. Amber 4pcs 12 Motors Trailer Atv Led Flexible Strip Light Tape Waterproof 12v Bar Turn Signal Light Running Parking Lights the best in cold problems and. When I connect my travel trailer to the Tacoma, I get brake, and turn signals but no running lights. Blinker would blink ALL lights off and on. The plugs that are on the driver's side on the frame under the bed appear to be professionally installed, but I'm not sure if it was sold that way initially or if it was an add on after purchase. If you have power at the tow vehicle pin for those lights, then you have to trace back from there. :) and besides, you guys are pretty damn knowledgeable about this stuff. I HAVE turn signals, four ways, brake control and brake lights but no running lights. Motorcycle LED Lights Custom LED Tail Lights, Turn Signals and Accent Kits. I didn't attach the fenders yet, I'll do that when the teardrop is on top of the trailer. Save on Optronics Universal Trailer Light Kit TL8RK/TL11RK at Advance Auto Parts. checked for ground it was ok. A typical 27′ travel trailer with a slide-out and a couple of bunk beds could have 20 or more incandescent light bulbs. You are eligible for a full refund if no ShippingPass-eligible orders have been placed. All products are available for purchase online. It is possible that one of the bulbs on your trailer burned out. Most people ask if I can explain the RV electrical system in simple to understand terms. You cannot receive a refund if you have placed a ShippingPass-eligible order. I'm in love with this tool. I have no running lights. Another new feature on the 2015 F-150 is the Smart Trailer Tow Connector, which informs you of trailer connectivity issues, burned-out or unlit trailer lights and trailer battery problems. They also stay on when the tow vehicle is turned off. LED lights are known to be quite durable and have a longer life span than most other bulbs; in fact, they can even last for decades with normal use. RV Fridge Troubleshooting - methods you can use to do-it-yourself. LED lights create a uniform projection that that ensures maximum output and visibility, making LEDs highly. If I hit the brakes they would all go out. I installed a brand new wiring kit (new lights and wires) due to multiple splices and it just looked like the old one was in bad shape. However, there are some things that can screw everything up if not taken into consideration. One of the facts of life when you own a recreational vehicle is the problem of intermittent running lights. The brake lights, turn signals and trailer brakes worked, but the running lights did not. RV owners take pride in the interior of their motorhomes. com) are limited to Internet and phone orders (1-877-HITCH-IT). here is the whole story. Nissan added a wiring harness to the BCM on the 04-05s to correct the problem. I have ALL working lights in the Nirto, and trailer right, left and brake lights. How can I get my trailer lights to work? 12 Answers. With the trailer off the tow vehicle, check continuity on that wire from the trailer plug to that first light you can get to. Family Handyman. I didn't attach the fenders yet, I'll do that when the teardrop is on top of the trailer. Than you could figure where the wires on the trailer go and remove the 4 pin and install a 7 pin with the 1 hot wire running to you lights you just need to track them to where the hook up and probably cut that connection and run a new wire to the hot lead. so when the headlights come on instead of activating the running lights it kicks the brake lights on and in turn the trailer brakes, the fix. No problems with the install. The truck's running lights will work, but the trailer won't if the fuse is blown. We also use non-essential cookies to help us. The license plate light is out as well along with both front and rear marker lights). Brakes & turn signal lights do work. It doesn't make any difference, as the tail light wiring isn't affected. The 7 blade to 4 flat trailer plug converter has an LED on it and it only shows two of the three On or none at all. So, during daylight, no problem b/c all of the appropriate lights work just fine. then the only cause can be a shorted wire somewhere between the trailer connector to the lights at the rear of the trailer or maybe the light assembly is bad. Shorelandr trailer light issues a back tail light that won't display a brake light or turn signal. Both vans work properly with all our taillight only trailers, however with our box trailer that has perimeter running lights both vans will not light the running lights. Trailer plugs, connectors, and receptacles. If you have power at the tow vehicle pin for those lights, then you have to trace back from there. Why do both of my trailer lights flash when my turn signal on my truck is only using the left or right light? when I turn my running lights on and step on the. I looked under the hood in the bigger fuse box behind the smaller one. They fuse the trailer running lights seperate from the trucks, so if you have a bad connection or ground the connector out, it will blow the trailer running light fuse, but the truck will be fine. Trailer Lights – LED. The dealer found and repaired a chafed section that had worn through the wire insulation. The trailer has two rear lights, which work as running lights, brake lights, and turn signals. com - All Rights Reserved. We offer a huge range of trailer parts including electric, hydraulic, and disc brakes, couplers, fenders, jacks, lights, and much more. I have brake, turn and flasher but know running lights; when I hook up with the adaptor I have the same problem but no right side turn or flasher. My running lights for both my jet ski trailer and my travel trailer are not working when hooked up behind my 2016 Ford F250 Super Duty. I am having trouble with my trailer lights. Or do you mean "the tail lights and the turn/stop lights work fine. http://www. A trailer in every driveway. Testing Trailer Lights: Check the Grounds. Ive got an 07 with flat 4 pin harness. I can feel and hear the relay close when I turn on my lights, and I swapped it with the fog lamp relay to be sure (and the fogs still work). so the main power is going into a junction box and that is tied into the new plugs and tied also into a new light switch. “If your furnace has a pilot light—anything less than 20 years old won’t—there are instructions in your owner’s manual for how to relight the pilot,” says Bonner. Find out which one is always hot from your truck. No tail or running lights. Service rep. Do you need better ideas on how to wire trailer lights? There is always a solution fo that, even if there are absolutely no provisions for trailer lights. Also please check out the statistics and reliability analysis of Nissan Frontier based on all problems reported for the Frontier. In this case, the Customer Care team will remove your account from auto-renewal to ensure you are not charged for an additional year and you can continue to use the subscription until the end of your subscription term. The one problem with most of these kits and prewired installations is that they leave the truck wiring and electrical components vulnerable to problems caused by short circuits, and in many cases the factory truck wiring is barely adequate for running the truck taillights, let alone additional trailer lights. now I hooked up my utility trailer and no running light either. They corrode over time. Troubleshooting 4 and 5-Way Wiring Installations. All fuses are good in box at kick plate in passenger side of truck. Connect the trailer light system's connector (usually the male end of a four-prong flat connector) into the tow vehicle's female connector. All with the confidence that you can do more than ever before, because you’re backed by reliable WARN® products. Make sure your trailer is safely and properly connected to the hitch, along with all brake lights and signals are working as they should. The Switchback Bulb is designed to light bright white when the running lights are on. The 7 blade to 4 flat trailer plug converter has an LED on it and it only shows two of the three On or none at all. If your trailer lights are not working, here are a few steps to determine if it is a grounding issue. Ask them to turn on the headlights, which should make the trailer’s running lights come on. Chances are the cause of the defective light or brake lights circuit on your Chevy Silverado is a simple problem. Hooked up to trailer w/good light system. From bad fuses to bad grounds to a bad wire harness, we'll move step-by-step through some solutions to these irritating problems. I also checked my fuses on the truck and they're good. Online Leading Giant provides the best products at the right prices. Hi, we bought a 2017 31 ft travel trailer last weekend and after hooking it up to our Ford diesel all of the lights on the trailer worked. In my case, the brake lights didn't work but the turn signals did, so that told me the wiring to the bulbs was OK and the wiring running in the frame was OK and the bulb contacts were OK. daytime running lights and they don’t want to owe up to it. This includes the price of items you already have in your shopping cart. An hour into the drive back home we stopped to fuel up and I noticed that one of the trailers taillight covers fell off, but the light was still intact. How to Wire up Lights in Your Hotrod! Wiring up your lights doesn't have to be too complicated. When the Dust Clears, Warn is still the leader. We assume the lights in the hall and bathroom are running off of 12-volt, and that other lights in the RV are working fine. I was once told by an old time to not rely on my auto lights and to turn the lights on manually. Todayno headlights, but my running lights come on! I stopped and got 1 new relay, there are 3 inside the glove box. No problems until now One of the relays inside the glove box has been buzzing For a while now and every now and then the lights would Flicker. Does anyone know which fuse to check. 5 amp fuse and it has worked since with no problems. I have brake, turn and flasher but know running lights; when I hook up with the adaptor I have the same problem but no right side turn or flasher. Shop Truck-Lite online. However, it's very important to ensure that both the tow dolly and lights are properly. Many trailers have three circuits. The trailer is another story. Does it with just a test light as well. A light bar gets your trailer lights up where other motorists can see them, and they never get dunked. Hope this is the right forum for this. if you have every thing working there then its a wiring problem on the trailer and you will have to find the problem and repair. So if you have running lights but no tail-lights and license plate light, you can take the plug apart and hook the black with the brown wire. Though trailer lighting systems are available in an array of configurations, the most popular is the 4-way system. Ground problems are the top cause of issues with trailer wiring. It is not the trailer as verified it worked with another toyota. I have an adapter with test LEDs and everything seems fine (indicator shows when running lights on, left and right turn, etc). In addition, the available Dynamic Hitch Assist provides a line-of-sight guide to help direct your hitch ball to the trailer coupler. ok i had the main power going to a plugin. Now my taillights don't work but Brake lights, Turn signals are good. Rediscover the fun of off-roading. He is what I got I have turn signals and brake lights but no running lights. 1) Connect the trailer brake lights directly to the cut pair (light blue and black) - power and ground, This could be done through a separate plug. I have checked the bulbs an dthey work fine. Get the best deal for Caravan LED Lights from the largest online selection at eBay. I installed the brake lights (one was damaged before so I just replaced them both) and that went fine. Keeping the Pumps Running When the Lights Go Out. And even the brake controlers works perfect. If your ABS light comes on when you’re driving, that means that some type of fault has been detected in the system. There are four fuses labeled RIGHT, LEFT, TAIL, and POWER. The converters aren't made to run the extra voltage. I also connected brown wire to the black wire. Brake and stop lamps ok. I've written this simply as I can in easy basic steps so that hopefully anyone with a little understanding will be able to 'help themselves" as much as they can before having to ask for assistance. so here goes. Ran a new wiring harness and still no running lights. It was difficult to see the break. I have no power at the Envoy 7-pin plug for running lights. Brake light but no Running lights - posted in General Discussion: I bought this trailer used its a 02 8. From bad fuses to bad grounds to a bad wire harness, we'll move step-by-step through some solutions to these irritating problems. This fact narrows down the troubleshooting process. Check trailer wiring (ok)find problem is with van. Big Cree Single Row LED Light Bar – 44 Inch 240 Watt – Spot Sale! $ 369. The 2014 Chevrolet Silverado 1500 protects the trailer light circuits with four separate mini-fuses in the engine compartment fuse box. I checked all fuses and they all lit up with my test light. Generally you don't get any voltage so would suspect a loose or unsecured tightly ground. If your vehicle has a 4-pole connector, test the pin being fed by the brown wire. I assumed it was the pop-up. Everything is streamlined to allow you to easily find the best aftermarket, custom car lights and truck lights and replacement auto lights, and get them in your hands and on your car as quickly as possible. This could cause a fire. How to Wire Trailer Lights: Video tutorial on how to wire trailer lights. When I use my right turn signal only the right one blinks. The most recently reported issues are listed below. Some RV’s have at least 24 bulbs. hooked up 12 volt battery direct to running lights they. Each style comes in a variety of different lengths and color temperatures so you can find the right light for any application. The truck's running lights will work, but the trailer won't if the fuse is blown. 00 So will not complain all that much. We plugged the harness into a ford and the running lights worked. Troubleshooting Trailer Lights by Alan Glos (Excerpted from Messing Around In Boats)(click here for more information about MAIB) I am guessing that many readers have had a run-in or two with trailer lights and have had to offer up the lame excuse, "Gee officer, they were working fine when I left the house. Partsam 14x Trailer Marker LED Light Double Bullseye 10 Diodes Clearance Light Red/Amber, 4x2 Tiger Eye/Double Bubble 12V Rectangular LED Side Marker Light Indicators Surface Mount RV Camper Trucks. This includes the trailer tail lights, the license plate light, the rear clearance light, any identification light, side lights and trailer front cap lights. Start by testing your tow vehicle plug. 2000 Chevrolet Silverado lights problems with 16 complaints from Silverado owners. Hi, I have a couple problems with my M1045a2 First problem is that my transmission is in "limp mode" only does 1-2 gear. My truck does not have pwr locks or windows nor does it have the daytime running lights. All of the lights on/in the truck work fine, and there are no blown fuses blown under the hood or in the box near the drivers door. The most recently reported issues are listed below. With illumination of this caliber, you’ll navigate twists and turns with confidence. 5 amp fuse and it has worked since with no problems. Pilot Light Won't light or stay lit. For other problems, please see our comprehensive article, Water Heater Troubleshooting & Repairs. My problem is we have tried EVERYTHING i have singles 4 ways and marker lights. However, it's very important to ensure that both the tow dolly and lights are properly. Tail lights, turn signals, and hazards all work perfectly. Fits four-way flat plugs; Male and female brass connectors; Tests right, left, tail, and brake light wiring. I never had a chance to speak to the tech, so I don't know where in the run it occured. Also they are all grounded back via the white. If I hook up the trailer to a different vehicle, then The boat trailer lights all work perfectly. This includes the price of items you already have in your shopping cart. Once a function is used on the vehicle, the converter provides the actual power for the trailer lights from the battery. 428 Peyton St. If you haven't had the trailer on for some time you may not be getting a good ground. Support and troubleshooting EMC RepliStor, the software Data Replication solution on Windows platform, most of the problems are Replication performance on WAN, finding out the bottleneck is the key Support and troubleshooting EMC Backup Advisor (new name EMC Data Protection Advisor), the Performance Measurement & Monitoring/Reporting system. There's another possibilty. This kind of image (4 Wire Trailer Wiring Diagram Troubleshooting – Gooddy) earlier mentioned is labelled having: 4 wire trailer lights wiring diagram,. All your boat supplies and boating needs, including marine electronics, sailing hardware, plumbing, ventilation, epoxies, boat paints. All of the lights on/in the truck work fine, and there are no blown fuses blown under the hood or in the box near the drivers door. This is good all flat bed, house, cattle, boat trailers and any other trailer with the same king of lighting. A 5-ampere fuse (60-watts) should be plenty to operate the trailer running lights. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. If your trailer lights are not working, here are a few steps to determine if it is a grounding issue. OBD-II (Check Engine Light) Trouble Codes. Rediscover the fun of off-roading. Outdoor Accessories; Towing; Fifth Wheel Trailer Hitch. In fact, the cause of flickering lights is usually benign. I tried to connect a trailer to the trailer hitch connector and lost all of my marker lights. Moreover, you can blame most of these problems on little or no maintenance, according to James E. LEDGlow Lighting adds unique style to any vehicle or home with LED lighting products, including underbody lights, vehicle LED lights & LED interior lights. They fuse the trailer running lights seperate from the trucks, so if you have a bad connection or ground the connector out, it will blow the trailer running light fuse, but the truck will be fine. So, during daylight, no problem b/c all of the appropriate lights work just fine. Nissan Frontier owners have reported 9 problems related to tail light (under the exterior lighting category). Hi Alan, I don't think the trailer has a fuse or circuit breaker on the wiring to the running lights/tail lights. Compared to turning on the headlights, the daytime running light system. They corrode over time. so here goes. To determine many images inside 4 Wire Trailer Wiring Diagram For Lights photographs gallery please follow this specific url. One of the facts of life when you own a recreational vehicle is the problem of intermittent running lights. Thought I would run it by you guys before I call him tomorrow. I swapped the after market receiver out with a new one and it is still acting the same way. If your lights flicker when you turn on an appliance with a high wattage, the reason could be because the voltage in your home is fluctuating too much. We offer a wide range of styles: vehicle area lights, swivel utility lights, panel lights, dome lights, and more. All your boat supplies and boating needs, including marine electronics, sailing hardware, plumbing, ventilation, epoxies, boat paints. i've replaced the 10amp fuse that is in the cabin of my 04 yukon(10 amp fuse to the left of the steering column) 3 times today. Q: I am hooking up my 40 ft goodneck trailer to my Dodge, and I'm having a problem. the GFI breaker tripped and started blinking red and yellow, than the converter starts smoking and blows microwave, as the day progress our camper lights go dim and we have to plug to battery charger to the batteries to keep the A/C and the lights running while we camping this has happen twice and we have been at 2 different campgrounds. Challenge yourself. Make loading and trailering your boat easier and safer with our full selection of trailer lights including wiring and adapters. Running lights on trailer not working, Brake and turns work. This is caused by the amount of power being drawn by the high output lights or accessories. running lights on trailer do not work, all other lights work stop and turn 8 Answers. BoatUS Magazine associate editor Charles Fort walks you through the steps necessary to identify, troubleshoot, and fix boat trailer light problems. (just bought it used). They go from trailer plug to the under hood fuse box. To legally tow a trailer, vehicles must be wired for trailer lights. Though trailer lighting systems are available in an array of configurations, the most popular is the 4-way system. Forum - Ulterra problems in. There are 2 for trailer tow, not blown but no power to fuse, if I remove fuse and check leg of that plug should I get a light on one side! Brakes, turn signal, flashers, all work. THey are in the black box, usually under the hood, and marked "Trailer left turn, Trailer right turn, Trailer running lights" ect. If it only happened with a trailer attached then that may hint at an overloaded relay or something.