Mechanics

THE BRAKES ON MY TRAILER WON'T WORK WITH THE WIRING HARNESS ON MY .

2001 GMC Truck • V8 4WD Automatic • 115,000 miles

I have brake lights on my 2001 GMC Sierra, but I can not get brake lights on my boat trailer. I have a factory installed wiring harness. I have checked the fuses. I have power coming into the brake light switch with the orange wire and power going out through white wire only when brake pedal is depressed. Is this correct?
Thanks,
Terry
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Terry Cox
May 12, 2011.



That's correct-check and test the vehicle stop fuse it goes thru there when the brake pedal is depressed

Rasmataz
Jul 18, 2011.
Ground trailer to truck

Tiny
HarlandHARLAN
Nov 26, 2012.