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Thread: Engine Fan always on
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05-31-2014 #1
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Engine Fan always on
My Electric engine fan suddenly just started staying on with the key even when cold. I was in the vincinty of the temp switch wire when installing Hydroboost lines. How do I check the switch what can I expect to read at the wire to test signal.
I changed the relay out just in case that was it no change engine kicks on as soon as car is started.1973 Firebird 466 Pontiac, T56, C5 Brakes, PTFB and Hotchkis suspension
2011 Camaro SS Supercharged, ZL1 body and brakes, Z28 suspension.
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05-31-2014 #2
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Check grounds?
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05-31-2014 #3
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Engine Fan always on
The temp sender is a ground. It switches internally to straight ground when it reaches the proper temp. Unhook your switch wire, check ground between it and the engine. If it reads 0 ohms or straight continuity, then it's the sender. Otherwise check the wire. It may be grounding out somewhere- pinched, etc.
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