radiator fan

2006 CHEVROLET COBALT
75,000 MILES • 2.2L • 4 CYL • FWD • AUTOMATIC
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MOCHTO
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  • 1 POST
The radiator fan has three wires. I know it is a two speed fan. If the fan is going to run on high, which of the three wires is negative and which are positive?
May 19, 2016 at 2:10 PM
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 POSTS
The gray wire is high speed and the black wire is ground, but do not just go trying to hook it up to a toggle switch or something like that. The fan pulls way too much current for that. It has to run through a relay here is a guide to help you test the relay with the fan wiring diagrams below. Check out the diagrams (Below). Please let us know what happens.
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May 19, 2016 at 3:37 PM
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