1985 GMC NEED TO FIND OUT....

  • Tiny
  • T Mo
  • 1985 GMC

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?

Thursday, March 27th, 2008 AT 10:50 AM

3 Answers

  • Tiny
  • rasmataz
  • Member

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

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Thursday, March 27th, 2008 AT 11:00 AM
  • Tiny
  • T Mo
  • Member

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.

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Thursday, March 27th, 2008 AT 11:55 AM
  • Tiny
  • rasmataz
  • Member

For me at the coil side of the relay positive goes in and the other side goes to ground

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Thursday, March 27th, 2008 AT 3:50 PM

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