fan runs after key is off?

[Blazer406]

Hey guys,

I think I have a problem with my fan. I can crank my car (from dead cold) and let it run for 10 seconds. When I turn it off, the fan cuts on and runs continuously for like 10 minutes or so.....????

What could cause this?

 

[scottyb]

It's a bad delay relay. It's the largest of the 3 relays on the driver side inner fender. You can unplug it and the fan should still function properly as long as everything else is in order.

 

[turbosam6]

Wrong.

Its actually supposed to run for about 10 minutes, if the temperature is high enough. If it continues to run for more than 10 minutes and is draining the battery then the relay is bad.

 

[scottyb]

No, he said he runs the engine from a dead cold for 10 seconds. Either the relay is bad or the high temp switch is bad (or grounded elsewhere). Since he said the fan comes on AFTER shutdown, then I think it's safe to assume the relay is bad.

 

[Blazer406]

No, he said he runs the engine from a dead cold for 10 seconds. Either the relay is bad or the high temp switch is bad (or grounded elsewhere). Since he said the fan comes on AFTER shutdown, then I think it's safe to assume the relay is bad.

Scottyb is correct. I can go out into the garage to crank the car (car hasn't run in 24 hours). I let it run for 10 seconds and shut it off. The fan just keeps running. If I put the keyswitch back in the run position with the car not cranked.... the fan goes off......put keyswitch back in the off (lock) position.... fan cuts back on.

 

[2QUIK6]

Mine have never ran on the GN after cutting it off, even when the car was 3 years old with 10k miles on it. Eventually it started draining the battery even though the fans weren't on. I simply unplugged the relay, been that way for years and the fans work fine while the engine is on. The delay is supposed to run the fans after engine shutdown until the temps drop below a certain amount....it never made since to me since the fan cools the radiator contents and not the engine block/intake where the temp switch is.

My TTA did work properly for a short time after I got it...soon the fans would not shut off so I unplugged the relay on it too now.