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03-16-2022, 08:01 AM
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#1
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Junior Member
Join Date: Jul 2019
Posts: 2
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Weird acting lights
Hello all, This problem has been bugging me and I can't get it fixed. When I hook up my tow vehicle (2013 f150) to my travel trailer, I have no running lights, turn signals or brake lights on the camper but do on tow vehicle. I'll take it down the highway with wife driving behind me and after a few miles to a half hour, everything works. While driving I get a message on and off of Trailer not connected, then trailer connected. It'll do this until everything all of a sudden works. We get to the site and hook back up after a couple days-week and everything works as it should, but whenever it sits at home for a month or so back to the same thing.
Checked the vehicle connector, good (use other trailers with no problem), tried hooking up extra ground on trailer, nothing.
I'm completely stumped.
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03-16-2022, 08:17 AM
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#2
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,321
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It sure sounds like a bad connection on the ground. Check the wires going into the trailer.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
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03-16-2022, 08:23 AM
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#3
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Senior Member
Join Date: Jul 2005
Posts: 5,996
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Open ground between trailer and tow vehicle.
__________________
TandW
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03-16-2022, 08:30 AM
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#4
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Senior Member
Join Date: Mar 2019
Posts: 2,959
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I'd start by inspecting the 7 pin connector on both the truck and trailer. Use contact cleaner, or at least WD-40 or such and work connector in and out a dozen or more times. Any bad connection there will cause the issue. Inspect wiring and ground to trailer. Run a long jumper cabel from truck ground (frame or better, directly at - battery terminal) straight to the trailer frame on a clean unpainted surface. If problem goes away it is the groound.
If all seems OK, start suspecting a bad TBCM. You may be getting error messages in the dash display, but a full module scan may be necessary to confirm this. Traiiler brake control modules are mounted at the rear of the trucks, get battered with rocks and debris and pummeled with water, road salt and dirt. Some split apart and corrode away. Some are aluminum bodied and fall apart like dust.
__________________
2011 GMC Sierra 3500HD gas 6.0 dually
1994 K1500 Suburban shop mule and plow truck
2006 Lakota 29RKT 5th wheel
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03-16-2022, 09:18 AM
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#5
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Senior Member
Join Date: Apr 2021
Posts: 237
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Bad ground. Used to happen all the time with horse trailers that grounded via the hitch and ball instead of a wired connection. After the trailer was off of the ball, the ball and the hitch would rust of get dirty and not make a good connection. Pull for an hour of so and the ball would clean up and things would work.
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