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Radiator fan wont start when engine is hot! HELP!
Topic Started: Sep 21 2011, 02:00 PM (1,917 Views)
mwellner4
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Ok so my radiator fan won't start... I've tried a few things. Tested the motor, it didnt work... so I replaced it with a new one, got it for like 40 bucks. Still didnt kick on. Checked the fuse, good. Changed out the relay, still didnt work. Maybe thought it was the connector so I cut it off and wired it straight together... Still didn't work. So I'm stumped. Any ideas?
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Alpine
1020cc G10 GOML

thermostat alright?
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Memphis metro


Check engine light on? My guess is the ect sensor.
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Tofuball
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Strange Mechanic

I think these cars may use a separate thermoswitch and relay just for the fan. Check that it's flipping on, just like the relay.
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Stiffchezze
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Sir Metrologist

If all the electrical is fine, it sounds like a bad coolant temp sensor to me. I think on that '95 you have two. One for the gauge and one for the computer. If you gauge is working, I bet the computer one is bad. You may not get a "Check engine" light.
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Memphis metro


Tofuball
Sep 21 2011, 02:07 PM
I think these cars may use a separate thermoswitch and relay just for the fan. Check that it's flipping on, just like the relay.
Good call, it could also be the relay sticking.
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Tofuball
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Strange Mechanic

enginedoctorgeo
Sep 21 2011, 02:14 PM
Tofuball
Sep 21 2011, 02:07 PM
I think these cars may use a separate thermoswitch and relay just for the fan. Check that it's flipping on, just like the relay.
Good call, it could also be the relay sticking.
Oh man sorry about that I don't know what came over me.
I meant "You might have a manual fan, they have to be spun by hand"
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mwellner4
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ok... so what is and where is the possible separate thermoswitch?
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mwellner4
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There is no check engine light on.
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snowfish
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Basic GearHead

Should be on the thermostat housing.
Posted Image

The Yellow plug is the fan switch. The one next to it is for the temp gauge. At least on a 91...................... :hmm
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Memphis metro


My 95 has a green connector on it.
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mwellner4
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mines blue... but am i just supposed to replace it? will autozone or someplace have it?
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snowfish
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Basic GearHead

Test the fan first. Could be a bad motor. Never know.
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mwellner4
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snowfish
Sep 22 2011, 12:30 PM
Test the fan first. Could be a bad motor. Never know.
I already tested the fan... it was bad. Thats why I replaced it. Anyways so I unplugged the thermostat switch on the housing while the car was on and the fan started up. What do I need to replace?
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Memphis metro


If your temp guage shows the car to get to operating tempature then chances are good you need that sensor in your thermostat housing.
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