Electrical Issue

By toppjimmy
April 19, 2010 in Ask A GM Technician

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toppjimmy

Posted April 19, 2010

I have a 1991 suburban, today I was parked and letting the ac run while my wife was shopping, I had bothfront and rear going. When I was leaving I put my foot on the brakes, the brake light came on, the ac units stopped working, and the power windows wouldnt roll down, the fuses were fine I did change the 30 amp relays though. What is going on.Also the speedometer stopped working........

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