fan won't turn on - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 9 Old 02-15-2003, 05:50 PM Thread Starter
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fan won't turn on

I have already replaced the fan with a new one, and got one of those plug in relay things that connects between the fan and the wiring harness, but it just won't turn on. Is there a fuse that I need to check? Some sort of other relay that is bad??



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post #2 of 9 Old 02-16-2003, 01:45 PM
 
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in front of the radiator is a black metal box. it is called the ccrm, constant control relay module. the fan relay is in that box. sounds like the relay is out, which denotes replacing the ccrm. get a test light and see if the fan is getting power. if not, check the circuit to the ccrm from the pcm, and then out of the ccrm. if you have power on that circuit going in and not out, you need a new ccrm.



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post #3 of 9 Old 02-16-2003, 04:15 PM
 
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Good luck. I replaced everything... fan, motor, sensors, thermostat, ccrm & added the recall circuit breaker, and mine still won't come on. So I wired mine to a switch.
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post #4 of 9 Old 02-16-2003, 09:09 PM Thread Starter
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Quote:
Originally posted by puckbunny
Good luck. I replaced everything... fan, motor, sensors, thermostat, ccrm & added the recall circuit breaker, and mine still won't come on. So I wired mine to a switch.
Hmmm. Maybe I can just rig it to turn on autpmatically when the car is on.

How much did the CCRM cost about? I was thinking of going to buy one tomorrow, but if I am gonna end up wiring it to a switch, I might just forget about buying the CCRM. Thanks.


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post #5 of 9 Old 02-17-2003, 01:08 PM
 
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It has been awhile since I bought it. Seemed like it was $100. But I can't remember for sure.

Wiring the fan right to the fuse box can blow fuses. Plus I wanted the flexibility of being able to turn it on myself. A buddy of mine has his on this sensor deal that kicks it on early and leaves it on until the car hits a certain temp - but that cost him $175 to do. My way was cheaper.
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post #6 of 9 Old 02-17-2003, 07:37 PM
 
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I saw this article posted a while back regarding a manual fan switch setup:

http://www.allfordmustangs.com/Detailed/499.shtml

I'm not sure if this works - anyone else have this setup?
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post #7 of 9 Old 02-18-2003, 07:25 AM
 
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Quote:
Originally posted by Hellion
I saw this article posted a while back regarding a manual fan switch setup:

http://www.allfordmustangs.com/Detailed/499.shtml

I'm not sure if this works - anyone else have this setup?
This will work. The switch is taking the place of the PCM when it is closed. This is the best setup to use because there is still computer control of the fan in case you forget to turn the fan on (That is if your computer control is working).
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post #8 of 9 Old 02-18-2003, 09:52 PM
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Anaconda have you checked to see if your temperature sensor is hooked up on your lower manifold? you computer may not be getting the signal. There are two sensors. the one on the drivers side of the lower manifold I think goes to the dash gauge. The one on the bottom of the heater tube is the other. check to see if is working and hooked up. The fan is controlled by temperature.
Check the cheap and easy stuff first. Take it from the wazee.
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post #9 of 9 Old 02-20-2003, 09:18 AM Thread Starter
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Quote:
Originally posted by wazee
Anaconda have you checked to see if your temperature sensor is hooked up on your lower manifold? you computer may not be getting the signal. There are two sensors. the one on the drivers side of the lower manifold I think goes to the dash gauge. The one on the bottom of the heater tube is the other. check to see if is working and hooked up. The fan is controlled by temperature.
Check the cheap and easy stuff first. Take it from the wazee.
I don't think that's it because the fan doesn't even turn on when I turn on the A/C.


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