cooling fan no go on the low

[nealtotheking]

I've seen similar issue discussed but my cooling fan will not come on the low side. We checked the relay and it seems to be working. I was trying to avoid replacing the cooling fan if possible, any suggestions?

[CREWZIN]

WELCOME to the forum. OK, so you say you've checked the relay. There's two relays (high & low) in the fuse box under the hood. Does the fan work on high speed? The computer controls the on/off of the fan and which speed is selected by means of sensors and your fan doesn't work above 35mph. Above that speed, the air coming in through the radiator should/does keep the water cool. Also, the number #5 (40amp green) fuse under the hood (picture below) is for both speeds of the fan, check that. Good luck.

[StantheMan]

I have a 2002 PT Cruiser and have a question on the cooling fan operation.

I disconnected the cable to the cooling fan and applied 12 volts to the fan through the connector. I don't know what to make of the results.

When I apply 12 volts from the Black center wire to the Yellow wire the fan runs fast.

When I apply 12 volts from the Black center wire to the Green wire the fan does not run.

When I apply 12 volts from the Yellow wire to the Green wire the fan does not run.

Is this correct? How do I test for Fan High and Fan Low.

Also when the A/C is turned on the Low Fan does not come on. Any advise.

[oldcoach]

I have been through this just a few weeks back, the low speed part of the fan motor went bad. I found this out the hard way one night around 8:30 stuck in stopped trafic on I-75 when the PT over heated and I had to have it towed home.
The Black wire is ground, the yellow is High speed, and the Dark Green is low speed.
Good luck, but sounds to me like you need a new fan motor.

[StantheMan]

Another question - High Fan - I know the relay works and I know the Fan works on high speed. If the car starts to overheat wouldn't the high speed fan turn on.