Thread: Wiring question
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Old 04-03-2014, 07:52 AM
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The blue wire on a 7 pin plug is for electric brakes.



But, on a Mastercraft 5 pin flat plug, the blue wire is for locking out the brake servo so you can back up. So, on the tow vehicle that wire needs to go to the reverse lights. Not a brake light.
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Last edited by CantRepeat; 04-04-2014 at 04:54 PM. Reason: blue
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