Fans won't turn off

[YZF-Ford]

My cooling fans won't turn off, even with the key out of the ignition. Could the CCRM be the problem, or would that only be a problem when the key is on?

 

[luigisho]

I don't know if it's that or the pcm but the ccrm is a good first guess

 

[rubydist]

if the relay contacts in the ccrm are welded, they can cause the fans to stay on even with the key switch off.

 

[whiteguy3]

CCRM is the usual suspect.

 

[gmail]

this could very well be the computer.. this is how the fan system works.. if you unplug the PCM the fans run none stop.. this is because the factory PCM grounds out the fan pin to shut it off.

when there is no ground it will run the fan.

this in turn when un grounded triggers the relay in the CCRM..

almost every CCRM fan related failure i ever seen didnt allow the fans to turn on, not the other way around.

 

[KyngofPop]

When my CCRM failed in my old 94 mtx it made the fans run constantly but only when the ignition was in run or on position.

 

[gmail]

ok well there ya have it.. check the ccrm first then check pcm

 

[SHOuMINE]

ok well there ya have it.. check the ccrm first then check pcm

and then......

 

[YZF-Ford]

Wacky Ford electronics, it fixed itself! Haven't let it warm completely up yet to see if they will come on, though. The battery had recently been just been discharged, so maybe that caused a brainfart?

 

[bigblock]

i had the same problem on my 90. i thought the same thing. "hey maybe its the ccrm?" so i went over and hit it, what do you know the fan stopped lol! i got tired of doing that so i swapped it with the 89's ccrm. not problems since.

 

[gmail]

Wacky Ford electronics, it fixed itself! Haven't let it warm completely up yet to see if they will come on, though. The battery had recently been just been discharged, so maybe that caused a brainfart?

replace ccrm.. sounds like a sticky relay