Fan problem
Thread Starter
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Fan problem
My fans wont come on unless the AC is on could this be a bad relay? I haven't had a chance to look at it yet but I noticed the car zooming past 235 degrees so I looked at my fans just sitting there and cut the AC on then bang they where running. I thought I would post here first and see what you guys think before I break out the meter tomorrow and start chasing wires.
Thanks in advance, :cheers:
Thanks in advance, :cheers:
Thread Starter
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Re: Fan problem (88vettelover)
Had the same problem with mine, and it was suggested to me to install a new t-stat. I put a new one in and bam, fans came back on.
They are cheap enough so I may pick one up today but I just cant see how a T-stat would stop the fans from working. My car runs at 200 deg's as long as the A/C is on and it was 90 degrees yesterday and that was also in traffic.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Re: Fan problem (84LT1)
The fan is ECM controlled with the AC on. Have you tested your fan relay or the thermo switch-it's a fairly easy test.With the key on ground the temp. switch-if the fan comes on now it's a faulty switch. To check relay-located in front of battery on wheel well-jump terminal A black/red wire to terminal E red wire, if the fan now comes on the relay is faulty. ;)
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: Fan problem (84LT1)
The fan(s) are NOT ECM controlled on an '84. The main fan comes on when activated by the temp switch in the right head between the #6 and #8 spark plugs. Since this is an engine conversion and likely an ECM conversion, too, one can only guess how the fans are wired.
A thermostat change will have NO effect on fan operation.
RACE ON!!!
A thermostat change will have NO effect on fan operation.
RACE ON!!!
Thread Starter
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Re: Fan problem (CFI-EFI)
The fan(s) are NOT ECM controlled on an '84. .
RACE ON!!!
RACE ON!!!
