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Dual fan not working

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Old 05-10-2016, 03:14 PM
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Car: 1987 Chevy Camaro Iroc Z
Engine: 305 TPI
Transmission: Automatic (700R4)
Axle/Gears: 3.23
Dual fan not working

Hey guys. My car was sitting for about 2 years. Drove it maybe less then 5 timeso the past 2 years. Anyway I moved, took out my car Saturday and drove it to my new house. It was about 30 miles and ran fine. It was cool driving bc it was mostly highway. When I got home I noticed the fan was not running. I believe it ran before I drove to my new house because I let the car run for awhile before I did my drive. When I got home I noticed my temp gauge was going up. Checked my fans and they weren't on. The fan turns on when I turn my AC on. Does anyone know what could be the problem? Could something be wrong because I let the car sit? BTW I changed the coolant temp sensor a few years ago. It's an 87 305 TPI.

Last edited by TVIROCZ; 05-10-2016 at 03:19 PM.
Old 05-17-2016, 10:11 PM
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Car: 91 z28
Engine: LS1
Transmission: 4L60e
Axle/Gears: 10 bolt 3.42
Re: Dual fan not working

This is a 92' but the jist is there,
http://www.austinthirdgen.org/mkport...an_V8_vinE.jpg

diagram would lead me to look at coolant temp switch.
Old 05-18-2016, 04:42 AM
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Car: 1990 Trans Am
Engine: 305 TPI
Transmission: Auto
Axle/Gears: Stock
Re: Dual fan not working

I'd rather suspect the relay.
Take a look into my recent write-up on the subject right here:
https://www.thirdgen.org/forums/memb...ml#post6038488


You should give the ALDL bridge a try first. If it doesn't come on, swap the relays.
Same result? Check whether your secondary fan still comes on with the A/C, then swap the fan motor connectors and turn on your A/C again. Your primary fan should start running, if it's not shot.
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