Start a new brake light don't come on when turn signal is on what could it be

Asked by Feb 02, 2017 at 10:47 PM about the 1990 GMC Sierra 1500 K1500 4WD Standard Cab LB

Question type: Maintenance & Repair

1 Answer


Check the 4 way flasher button, make sure it is completely turned off, maybe turn it on and off a few times just make sure, then check check for proper operation, if it is still doing it then it is in the turn signal switch itself.

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