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Discussion Starter · #1 ·
Searched and couldnt find it
 

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Benny Hill
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What ????????????
 

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I would guess the power wire to the license plate light. Use a multi-meter or test light to determine which is power and which is ground.
 

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Discussion Starter · #4 ·
its for the back up lights, there are two wires going from the bulbs
 

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backprobe the trailer harness and find the reverse wire there. or take the super easy way out and go to the reverse light...not really hard to find a reverse light circuit.
 

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i would use a 2 way switch and tap in the reverse lights and cargo lamps.
Take the tail lights off and you will see the pos and neg wires, i cant rememer the colors but it will be obvious when you see them. I think neg is grey with black stripes...
 

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Discussion Starter · #8 ·
Cool thanks. Sorry for the incoherentness of the first post, was exhausted and had been working all day and then on the truck in the dark!
 
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