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Trailer lights

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lc

05-21-2003 19:30:58




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I have a common 5X8 trailer that developed trouble with the lights. I replaced everything. They still don't work right. It has 3 wires. One to left blinker, 1 to right blinker, one to the tail lights. Any of them will work separately. BUt if you turn on headlights, then press brake pedal, all lights go out? What am I missing? Should be so simple. ??




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John A (Va)

05-22-2003 04:10:32




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 Re: trailer lights in reply to lc, 05-21-2003 19:30:58  
What Chris and mrx said. The connection of the trailer to the vehicle does not always provide a sufficient ground. You need a separate wire (white) that connects to the trailer frame via a bolt or screw.

JA



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Chris

05-21-2003 21:16:59




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 Re: trailer lights in reply to lc, 05-21-2003 19:30:58  
Like mrx said you are missing the ground wire . there should be 4 wires not three.



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mrx

05-21-2003 20:18:43




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 Re: trailer lights in reply to lc, 05-21-2003 19:30:58  
ground



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lc

05-22-2003 05:49:16




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 Re: Re: trailer lights in reply to mrx, 05-21-2003 20:18:43  
THanks, I will try that. There is a 4th white ground wire. Short. Doesn't go anywhere. I have looked at new ones, they are the same way. I will try attaching one to see if that works. My meter does suggest current is bleeding over to the other wires. Thanks again.



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RWK in WI

05-22-2003 18:49:07




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 Re: Re: Re: trailer lights in reply to lc, 05-22-2003 05:49:16  
A quick / temporary way to test is to use a single battery jumper cable - one end clamped to a bare / unpainted bolt on the trailer and the other end to a clean connection on the pulling vehicle. This quick fix has limped many a trailer home with legal lights.



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lc

05-22-2003 19:20:07




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 Re: Re: Re: Re: trailer lights in reply to RWK in WI, 05-22-2003 18:49:07  
THanks guys, a good clean ground wire fixed it. They now work like they should.



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John

05-23-2003 10:22:10




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 Re: Re: Re: Re: Re: trailer lights in reply to lc, 05-22-2003 19:20:07  
Ah yes!.. you must have a ground, or is it an Earth...or as we called it when I was a welder, A Land Wire.



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