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cooling fan on after big 3 upgrade


stockgp

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i'm stumped. after i upgraded the big 3 again, the cooling fan on the driver's side is always on.

 

i can rewire it to make it work like it's supposed to, but i'd like to know why it's doing this.

 

i didn't short anything. i ran the new wires to the same spots i ran the last ones. any suggestions?

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hmmm. Try swapping the relay for that fan with the one for the other fan to rule out a bad relay (although I doubt that's it). Could be the coolant temp sensor in the lower intake is bad, but, from my experience, when they go bad, they will give a "cold" reading to the ECM.

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forgot to mention i already did that.

 

and to clarify, the fan is on whether the ignition is or not. as soon as i hook the grounds back up, the fan comes on.

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I can only think that something is being grounded, completing the circuit, for the fans to kick in.

 

You only touch the main ground and positive cables, correct?

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Did you get the right ground above the radiator? Maybe you got another groung instead of the negative battery ground. I know on my car theres two grounding spots there....

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only main positives and negatives, yes.

 

19cutlass94, i didn't even touch that ground. i left all the factory grounds in place, and ran my new grounds elsewhere

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either the fan is getting power at the fan wires them selfs or the input for the relay is getting constant power... my guess is you have a short somewhere in the wiring.

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Did you get the right ground above the radiator? Maybe you got another groung instead of the negative battery ground. I know on my car theres two grounding spots there....

 

The right ground? Another ground? Ground is ground. Now whether or not it's switched is another thing.

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