Mechanics

MODELS NEED TO FIND OUT....

1985 GMC Other

Electrical problem
1985 Other GMC Models V8 Four Wheel Drive Automatic 80,200 miles

I have a 1985 GMC Suburban and I need to find out if it is positive side switched or negative side switched, how do I know?
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T Mo
March 27, 2008.



What are you working on? I don't get it

Rasmataz
Mar 27, 2008.
I am installing a headlight flasher and I need to know if I have a positive or negative side switched system, dont know how to find out.

Tiny
T Mo
Mar 27, 2008.
For me at the coil side of the relay positive goes in and the other side goes to ground

Rasmataz
Mar 27, 2008.