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Eletric fan help

Eletric fan help

Postby Daddy_Dave [OP] » Sep 21 2020, 3:44pm

New used truck i bought.
2000 gmc sierra 1500 rcsb.
6.0 swap.
Presvous owner installed e fans.
Couple issues.
I can not find soruce of power.
2 wires ran from fan straight to switch.
12 volts at switch across switch off position.
I want to install relay set up so that fans kick on when ecm tell them to.
Any suggestions on relay kit?
Any ideas on where fan is getting power. I have look all over fan looking for harness or another set of wires and can not find. And wires dont break between fan and switch.

Thank you
I have pics if any one wants me to post for refrence.
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Re: Eletric fan help

Postby silentbravo » Sep 21 2020, 5:18pm

If you're getting power at the switch then one of the switch wires goes to hot somewhere.

Simplest and most reliable relay setup is the OEM relay module that GM used on these trucks/full size SUV in 05-06. Cheapest way to get them is a junkyard.
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