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Trailer wire...

blue should be for reverse. Some trailers especially new ones ith surge brakes have a solenoid that relieves brake pressure when backin a trailler up This prevents the brakes from actuating while in reverse
 
bigjeepman said:
blue should be for reverse. Some trailers especially new ones ith surge brakes have a solenoid that relieves brake pressure when backin a trailler up This prevents the brakes from actuating while in reverse
Click to expand...
blue is for the trailer brakes on a 7 blade the black always went to reverse
 
Jump This said:
Thats it. Thanks

and the blue is for trailer brakes...thats the one I am running necessitating the switch to the seven wire set up.
Click to expand...
i kind of figured that it's a common thing i used to do.
 
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