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Old 05-10-2010, 02:29 PM
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wiring car to trailer to many wires

I have a regular flat 4 wire adapter on my vehicle. The trailer has 6 wires going into a flat 4 wire connector. I have lights on the trailer but no brake lights or turn signals.
The trailer adapter has 1 green wire, 1 yellow wire, 2 brown wires (solid brown and brown stripe) and 2 white wires (solid white and white with a green stripe). The brown and white wires combine to go into each socket.
Why can't I get the brake lights and signals to work?
Thanks for any assistance.

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Old 05-10-2010, 10:50 PM
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VEHICLE ....yellow is left turn and stop, green is right turn and stop, brown is tail/side markers and white is ground. TRAILER...colors are the same as vehicle, sounds like a boat trailer wiring kit, where they run a tail down each side. if the white wires are joined with the brown ones , then they are for the side marker lights. if they are separate from the browns ,then they are the ground wires. lites are grounded through the mounting bolts.
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Old 05-11-2010, 05:59 PM
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Doc DC, so how do I make the yellow and green (signal lights) work?
Thanks for the help...
I'm thinking about scrapping the current lights and replacing the entire system.
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Old 05-11-2010, 08:10 PM
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take a hot wire or a batt and just put power to each wire on the trailer and see what lights up if its acting funny
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Old 05-11-2010, 09:56 PM
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trailer tail lites typically have one bulb with 2 elements..2 wires out the back of it and ground thru the mounts.yellow wire down left side and green down the right. these are your turn and stop lights. on right side should be green to one wire and brown to other. on left isyellow to one and brown to other. if grounds are even marginal, things will drive you nuts. IF YOU TEST WITH A BATTERY OR HOT WIRE MAKE SURE U HAVE A SMALL AMP FUSE INLINE OR A BAG OF MARSHMELLOWS CLOSE BY.
trailer wires and flat 4 connectors= YELLOW=LEFT TURN AND STOP
GREEN= RIGHT TURN AND STOP
BROWN= TAIL AND SIDE MARKERS
WHITE= GROUND

Last edited by DOCTOR DC; 05-11-2010 at 10:02 PM.
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Old 05-12-2010, 07:39 PM
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does the vehichle have amber rear turn signals or does it use the brake lite to indicate a turn. You may need a converter.
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Old 05-12-2010, 07:44 PM
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I found out there are rubber bushing on the axles. I ran a ground wire from each light to the frame. NOW, every thing works.
Thanks for all the assistance.
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Old 05-12-2010, 08:02 PM
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very good
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Old 05-13-2010, 05:37 PM
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i just got to ask.....what did the rubber bushings on the axle have to do with it ? you have a ground issue it appears.they don't mean the ground literrally. glad its working.
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Old 05-13-2010, 06:16 PM
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Doc DC...... I was told at the trailer hitch shop that the Kendon trailer has rubber bushing in the axle between the frame and the wheel hub. Anyway, I ran a ground wire from the tail light down to the axle and grounded the wire on the trailer frame. It worked. So I don't know if the hitch shop guy knew what he was talking about .... but it works. It appears a good ground is always necessary.
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Old 05-14-2010, 10:09 AM
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Quote:
Originally Posted by DOCTOR DC
i just got to ask.....what did the rubber bushings on the axle have to do with it ? you have a ground issue it appears.they don't mean the ground literrally. glad its working.
My guess ........

lights on fender + fender mounted on axle + rubber bushings .... = no circuit (path) too ground via frame ...
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