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Radiator fan

Tiny
MOCHTO
  • MEMBER
  • 2006 CHEVROLET COBALT
  • 2.2L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 75,000 MILES
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?
Thursday, May 19th, 2016 AT 2:10 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 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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Thursday, May 19th, 2016 AT 3:37 PM

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