Help! Cooling fan doesn't run
Thread Starter
Instructor
Joined: Oct 1999
Posts: 145
Likes: 0
From: San Francisco, CA, USA
Help! Cooling fan doesn't run
The main cooling fan on my 85 stopped working...sort of. It still comes on around 220 degrees when the auxilary fan kicks in. I performed the tests that the manual shows:
- grounded the wire from the fan switch and the auxiliary fan came on but the main one didn't.
- jumped terminals at the relay and the main fan DID come on. So it's not the fan motor, or no power situation.
So I thought, bad relay. Put in new one....same thing.
I also replaced the switch (mainly because the insulation broke when I was taking off the connector) so I'm pretty sure that's OK as well.
Anybody have some thoughts what I can check? I'd hate to pay the dealer man, but I'm almost at that point. Thanks for any help. :cheers:
- grounded the wire from the fan switch and the auxiliary fan came on but the main one didn't.
- jumped terminals at the relay and the main fan DID come on. So it's not the fan motor, or no power situation.
So I thought, bad relay. Put in new one....same thing.
I also replaced the switch (mainly because the insulation broke when I was taking off the connector) so I'm pretty sure that's OK as well.
Anybody have some thoughts what I can check? I'd hate to pay the dealer man, but I'm almost at that point. Thanks for any help. :cheers:
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
Re: Help! Cooling fan doesn't run (OnDVirg)
OnDVirg-Is'nt the main fan supposed to come on at 220 degree? The aux. fan comes on when the A/C is on. I think this is how my '91 worked? I always mod the fans so they both come on at the same time using a thermal switch. It turns the fans on at 180 degrees. Check out Eckler's or mid America for this kit. You can also add a switch that will force the fans on when you are in traffic or inbetween auto x runs.
Dan
Dan
Thread Starter
Instructor
Joined: Oct 1999
Posts: 145
Likes: 0
From: San Francisco, CA, USA
Re: Help! Cooling fan doesn't run (PeteL)
Oops. Mistyped above. The main fan IS NOT coming on @ 220 degrees, but the auxilary is. That's why I thought I was so clever replacing the relay. But still no fan.
Burning Brakes
Joined: Feb 2000
Posts: 958
Likes: 1
From: SF Bay area, CA USA
Re: Help! Cooling fan doesn't run (OnDVirg)
Maybe the temp switch is not working. I think it is in the front of the intake below the throttle body.
When you jump the A and B terms on the ALDL does the fan come on?
When you jump the A and B terms on the ALDL does the fan come on?
