GMC sierra 1989 rear turn signals

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GMC sierra 1989 rear turn signals

Unread post by rebreb32 » Sun Jul 25, 2010 4:45 pm

all bulbs have been replaced-as well as the flasher--problem:rear turn signals are dim and blink slow-front are bright and blink fast. a/c control panel illuminates when turn signals are on


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Re: gmc sierra 1989

Unread post by willwildy » Fri Aug 13, 2010 11:21 pm

First thing I would do is verify that I have a good ground to the rear signals. If there is an increased resistance in the rear circuit it will affect the RC time constant and their brightness.
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