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| I got everything working well except now when the lights in the truck are on and I hit the brake the taillights go out. Otherwise the brake lights work fine with truck lights off and all signals work. Any ideas? |
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Posts: 1168
| Probably a ground problem. Most lighting issues are. Had a similar thing this spring and it ended up being a loose connection on my truck. Check your plugs, or anyplace where there is a connection in the back of your tow vehicle before you start tearing the wiring out of the trailer. |
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| i had the same thing happen recently only to go back to u-haul that put my wiring on and hitch on 1 yr ago and pay $90. however when i got home and tested it again , it still did the same thing so i replace both bulb capsules on my trailer only to find out that the bulb that looked ok , the filament hadnt all the way broke, was the culprit. just a light capsule for $10. oh well, live and learn i now have an additional 90 day u-haul warranty. |
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| Had this exact same problem and it was a grounding issue. The trailer is most likely grounded throught the hitch and to the truck. I solved the problem with a wire with alligator clips on both ends clip one to the trailer and one to some metal on the truck and you should be good to go! |
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| Your electricity is flowing in reverce. Check the slope of your trailer. |
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Posts: 1335
Location: Chicago, Beverly | if your hitch ball has a lot of rust that will cause grounding issues... make sure where your ground wire is connected that it has a clean ground(no rust/corrosion) and that your hitchball is free of rust/corrosion.. |
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new trailer light problem