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How to Determine Trailer Wiring Functions on a Travel Trailer for 7-Way Replacement

Question:

Have casitta trailer,2008Silverado. Could you tell Me which colors represent what function?having some difficulty

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Expert Reply:

Trailer wiring color codes can vary greatly so I have a solution for you, but I can't tell you which color wire goes where on your trailer for wiring up a new 7-way. However, you may look around the wiring junction box or pin box of your trailer. There may be a diagram there.

Instead you will want to use a jumper wire from a 12 volt source like a vehicle battery to apply voltage to all of the wires of your trailer wiring to see what activates. It can help to use masking tape to label them as you go.

For the # 50-67-008 that you referenced the wiring goes:

Yellow: center auxiliary
Green: tail and license lights
Brown: right turn and stop lights
Blue: electric brake
Black: battery charge
Red: left turn and stop lights
White: ground wire

expert reply by:
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Jameson C

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