Testing electric cooling fan - TCCoA Forums
 
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post #1 of 2 (permalink) Old 10-30-2010, 02:05 PM Thread Starter
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Join Date: Aug 2010
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Testing electric cooling fan

Hey guys, been a while since I've posted (mostly since everything is going so smoothly with the racer) but I have hit a snag.

When I just removed the entire A/C and Heating system on the vehicle. I bypassed the heater with a bit of hose looped and got an A/C Bypass pulley for the belt. I reassembled everything, only leaving a few clips unplugged, all of which went to the now uninstalled A/C and Heater system.

As I always do, I restarted the vehicle after the process was done to make sure everything was working properly before I started the next item on the list. The 'bird fired right up and ran smoothly, but the cooling fan never activated, regardless of the engine temperature. I never let the vehicle overheat, but the temp did rise above normal operating before I ultimately shut it down.

I have since pulled the cooling fan to examine it, but it appears to be intact. I have tried an old trick of mine (briefly wiring the fan up to a 9 volt battery) and haven't even gotten a jiggle out of it. If anyone else knows of any fan-testing methods, please let me know, otherwise I'm going to end up at a pick and pull looking for a new one.


By the way, it is a '97 Thunderbird 4.6L with the sport package, in case any of you are wondering.

Thanks
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post #2 of 2 (permalink) Old 10-30-2010, 02:58 PM
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Join Date: Jan 2010
Location: Bossier City, LA
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Quote:
Originally Posted by ProphecyG View Post
I have since pulled the cooling fan to examine it, but it appears to be intact. I have tried an old trick of mine (briefly wiring the fan up to a 9 volt battery) and haven't even gotten a jiggle out of it.
Well, since a fan can pull over 70A on startup, and a 9V battery is rated for, what, 500 mA ...

Try right off the 12V car battery.

Better, see if there's 12V going to it. Or that the relay is turning on for the fan.

RwP
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