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Old 09-13-2010, 07:48 PM   #1 (permalink)
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Rewired trailer now lights are wonky...

Completely rewired my 14 foot flatbed. switched all the the lights to the basic 60 series grote/trucklite. Turn signals work great and are super bright. Brake lights also are bright and good. Running lights are bright and all work. Problem is when the lights are on and I turn on the turn signal, all the lights flash, dimly. Even the LED on my voyager blinks. Every light is individually grounded and all the grounds are run together. ground on the truck is good too. When I did the light test, I just plugged it into the truck but did not attach the hitch or anything. I'm sure there is a super simple solution I'm just missing. What should I do?

Thanks!
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Old 09-13-2010, 08:04 PM   #2 (permalink)
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Did you ground just to the frame of the trailer or did you ground through the plug? Hitch to the truck I'll bet it works since it sounds like you need it for a ground connection
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Old 09-13-2010, 08:12 PM   #3 (permalink)
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yeah, sounds like a bad ground...


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Old 09-13-2010, 08:17 PM   #4 (permalink)
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Quote:
Originally Posted by bigun View Post
Did you ground just to the frame of the trailer or did you ground through the plug? Hitch to the truck I'll bet it works since it sounds like you need it for a ground connection
It is grounded through the plug too. That's what's so weird.
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Old 09-13-2010, 08:25 PM   #5 (permalink)
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I had a very similar problem once and it was APPARENTLY because the ground wire in the trailer plug had broken inside the wire loom, so it was only grounding through the hitch - but it still doesn't make sense to me why it would do that, and obviously that's not your problem. Maybe it's because the ground is weak for some reason - see if it gets better when you hitch the trailer up.
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Old 09-13-2010, 08:29 PM   #6 (permalink)
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Quote:
Originally Posted by Machinos View Post
I had a very similar problem once and it was APPARENTLY because the ground wire in the trailer plug had broken inside the wire loom, so it was only grounding through the hitch - but it still doesn't make sense to me why it would do that, and obviously that's not your problem. Maybe it's because the ground is weak for some reason - see if it gets better when you hitch the trailer up.
I wrapped the drag chains around the hitch. No change. Btw, its raining now so grounds should be better, right?
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Old 09-14-2010, 02:35 PM   #7 (permalink)
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I installed a set of cheapo lights for a guy, Even with a ground wire for each light the other lights would dim when the turn signal flashed. It was just a cheap harness.
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Old 09-14-2010, 03:14 PM   #8 (permalink)
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Hook it to a different vehicle and see if the problem follows the car or the trailer.

Sounds like a ground issue to me.
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