Junior Member
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Join Date: Oct 2007
Location: USA
Posts: 10
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Junior Member
Join Date: Oct 2007
Location: USA
Posts: 10
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Trailer lights don't work with headlights on
I have a 2002 4runner, never had a trailer light problem before. I don't tow often, but just got a boat trailer and put new lights and wires on it. I am scratching my head as to why the trailer lights, all of them, work perfectly with the headlights off, but not at all with the headlights on.
I've seen some suggestion that the common (brown) wire might be shorted, but with new wires on the trailer, and rechecking the whole length, I can find no shorts.
Any ideas?
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