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Discussion Starter · #1 ·
I'm trying to wire up my backup light and I can't get it to work. So what wire is it that makes the back up lights come on? Is it the light blue one?
 

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I think it's the white wire but it's pretty easy to tell with a test light. have someone help you by putting the truck in and out of reverse and look for the wire that has power when you are in reverse.
 
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