My 95 Taurus with 3.0 started overheating horribly leaving the race track
last weekend. Runs cool at highway speeds, but wants to overheat when
bumper-to-bumper or sitting still. Heard fan kick on once after I gave it a
little push (with the key off - I know, not a smart move), but it generally
does not kick on. Now - how do I determin if it's the fan motor, or the
relay? Fan will move when pushed by hand, but not continually spin freely.
How do I test to find out which is bad? It does need a coolant flush - it's
been 2 years since I last did it.
If you have a volt meter, you can measure the voltage at the
fan terminals. If you have 12 volts and it does not spin, its the
fan. If you don't have 12 volts (when hot of course), its the CCRM
relay module or a computer issue. You need to see where there is voltage and
where there is not.
Bob is right on the money here. Right on the money. That advice is
exactly right. I know this for a fact because even though it's not
exactly the same thing it's the same electrical theory. I worked on
HVAC before. When fixing residential and commercial heaters an HVAC
technician needs to do precisely that. He needs to hold a volt meter
to the connectors to see where there is voltage and where there isn't.
If there is voltage where and when it should be and vice versa. It's
all about trouble shooting and rulling out possibilities.
Okay - first off, thanks for the advice. Now, more of my ignorance.
I got my car heated up today, and pulled out a voltmeter. First connection I
checked got 14 volts, so I plugged it in. Viola! The fan worked! Yay, right?
No - now I can't figure out why it's working again! I left the car running -
it would heat up, then the fan would kick in, just like it's supossed to.
Now I want to know WHY!!
Any ideas? Loose connection? Dirt? In this picture, the lead plugs into a
box (the fan relay?), which in turn plugs into the fan. This 'box' was
pretty hot - but then again, considering it's location, maybe it should be
expected to be hot.
Anyhow - count myself lucky, keep an eye on the car, and go about my merry
I hate not having an answer as to why it works now.
Thanks again, for the advice and help, folks.
Look close at contacts... high current corrosion.... much like battery
Simple fix, plug/unplug several times, then get dielectric grease and coat
If air cant get to it, wont corrode.
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
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