Question about 1994 Saturn Sl

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My radiator cooling fan is not working. I have replaced the coolant temp sensor after I tested the fan by using jump wires with a twenty amp fuse. It ran fine. Could it be the temp sensor connector. Or something else. I'd appreciate any help. Thank you , Mike Ryan

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If you have A/C, you can check the system from the PCM output through the relay and to the fan motor by turning on the A/C and blower (with the engine on, of course): the cooling fan motor should turn on and stay on for several minutes.

Also, as you may know, this vehicle has a one-wire temperature sender that controls the dashboard gauge, but nothing else. (This one connects to a dk.green/yellow banded wire -- or maybe green/white banded.)

The other, two-wire temperature sensor is the one that connects to the PCM. This one has one yellow and one black wire. I assume that this is the one that you replaced.

And, in principle, there's the PCM itself that could be giving an inaccurate temperature... but that's expensive, so let's not go there...

- Roy

Posted on Oct 11, 2009

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Check the fan relay

Posted on Oct 06, 2009

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