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Post by Shadslinger on Feb 1, 2014 12:53:50 GMT -5
Aight you electrical wizards...brake lights and turn signals work fine with headlights off on truck. Turn the headlights on and tail lights and turn signals work and when you push the brakes the lights on passenger side trailer dies while drivers side works fine. Test light shows power coming out the plug at truck and power in the wires to trailer lights so....what is it. Ground issue inside the light housing?
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Post by Gotcha on Feb 1, 2014 20:49:19 GMT -5
Ain't the bulb itself is it?
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piper
New Member
Posts: 727 
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Post by piper on Feb 1, 2014 20:53:12 GMT -5
My guess is a ground issue or as gotcha said the bulb itself.
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Post by hotdog on Feb 1, 2014 22:40:13 GMT -5
I'd say a ground problem too. Maybe where the light mounts to the trailer. Does the light have a ground wire or is it one of those that grounds through a mounting bolt?
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Post by Shadslinger on Feb 1, 2014 23:29:19 GMT -5
Grounds through the mounting bolts. Bulb is good, pretty sure its a ground problem somewhere with the housing either inside the housing or not good contact with trailer
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Post by tommy1 on Feb 2, 2014 0:00:10 GMT -5
Sounds like a ground problem..get someone to hold a wire on the metal on the bulb holder and ground the other end that good that will be the easies way to tell, may need a new light if WD-40 don't fix it.
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Post by CorneliaGale on Feb 2, 2014 0:44:41 GMT -5
That is the reason I started running ground wires to the lights when I wire a trailer, sometimes they just won't ground thru the frame. I know they cost a bit more, but the led's are the way to go now.
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Post by fatdaddy on Feb 3, 2014 1:23:35 GMT -5
Sounds like a bad ground!!
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Post by hotdog on Feb 3, 2014 6:40:34 GMT -5
Grounds through the mounting bolts. Bulb is good, pretty sure its a ground problem somewhere with the housing either inside the housing or not good contact with trailer Most of the time I've found the problem is between the light mounting bolt and the trailer. You could probably remove the light and wire brush the nut & bolt and the trailer frame that it tightens against and you'd be good to go. Hope that takes care of it. Good luck. |
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Post by Shadslinger on Feb 8, 2014 18:16:13 GMT -5
tried wire brushing the mounting surface but still wouldnt work. had to run a wire from the mounting bolt to the bolt that holds my bunks on and it worked. Dont make sense but it works so all that matters. Thanks guys
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Post by CorneliaGale on Feb 8, 2014 22:52:30 GMT -5
I've had a lot of trouble with grounds through the frame, same way on the ground to the tow ball sometimes they will ground good sometimes they won't. Now I always use grounds to each light when I wire a trailer, plus I ground the frame too and a ground on the tow vehicle. I don't like to take chances on trailer light,I want them to work and be as bright as possible to be seen.
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Post by hotdog on Feb 9, 2014 12:59:33 GMT -5
Yeah, the old ground trough the tow hitch ball. Hook up the trailer and if the lights don't work just drive a couple miles till they do. 
I'm glad you got it worked out Shadslinger. |
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Post by CorneliaGale on Feb 9, 2014 14:01:42 GMT -5
Have saw a lot of trailers going down the road with the lights blinking on and off.
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Post by catfishking on Feb 9, 2014 22:22:46 GMT -5
shadslinger your truck plug has a post for ground on trailer plug should be a white wire drill a hole in trailer and put ring tong conector or wire and put a 1/4 bolt and nut tro it I have had to do that on lot of trailers the ball is not enouf ground you might all ready know this tho  |
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