Brake lights

Asked by GuruSZGZS May 14, 2019 at 10:51 AM about the 2003 Chevrolet Silverado 2500HD 4 Dr LT 4WD Crew Cab LB HD

Question type: Maintenance & Repair

Brake lights stopped working when I plugged boat
trailer in connector, fuses all good brake switch
good, stumped two days wasted trying to figure it
out

2 Answers
26,810

oilyspill answered 4 years ago

Did you check fuses and check fuses for voltage using a test light? You may be way ahead of me. As you can see in diagram, the orange wire to stop lamp switch is hot all the time and fuse protected. When the stop switch is activated, the white wire goes hot and carries voltage to those other two fuses, one fuse for lower brake lites and the other fuse for hi-mount brake lite.

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