Burned out cooling fan. Possible short in wire?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Mr. Crash Davis - 05 Aug 2006 19:41 GMT

Hey folks. I'm continuing my quest to stomp out electrical problems
from my 944.
(1990 944 S2)

So here's the deal: Driver's side fan is working fine (it comes on as
soon as the car is started, but that's another issue). The other fan
does not come on at all (not for cooling, A/C, etc). It didn't take me
long to find out why. Upon crawling under the car, I saw that the
rubber boot surrounding the connector for the second fan as well as the
white plastic connector were partially melted.

Diagnostics with a voltimeter revealed that the second fan is burned
out (no circuit completed). The cable that connects to the second fan
tested fine (.502 reading versus .540 for the driver's side lead). The
cable looks like a$$, but it's still passing current. So I guess the
fuse for the second fan is good as well, right?

Naturally I'm going to have to replace that fan. Do I need to replace
the wire too? Any idea what would cause the fan to short out like that?

Reply to this Message

Magickal Childe Spells - 07 Aug 2006 05:52 GMT

Wha??? You tested what? You didnt test the current, and I couldnt really
tell you what you tested.
Was the connector melted - or did it scrape against the road?

You have to check the schematic diagram and see what those connector pins
do. --

joliett
--------

> Hey folks. I'm continuing my quest to stomp out electrical problems
> from my 944.
[quoted text clipped - 15 lines]
> Naturally I'm going to have to replace that fan. Do I need to replace
> the wire too? Any idea what would cause the fan to short out like that?

Reply to this Message

Mr. Crash Davis - 07 Aug 2006 10:22 GMT

I set the meter to beep if the circuit was completed. I'm not sure
what that number measured. If the circuit was completed, the meter
would beep and those numbers would be displayed. If the circuit was
open, then I would get infinity / overload. Does that help?

The cable won't reach all the way down to the road. Also, scraping
against the road would not turn the white connector black like this.
There was definately some melting action going on here.

> Wha??? You tested what? You didnt test the current, and I couldnt really
> tell you what you tested.
[quoted text clipped - 5 lines]
> joliett
> --------

Reply to this Message

Bill - 12 Aug 2006 05:28 GMT

ok, so you used the meter on the ohms scale and measured resistance. Now,
we need you to measure voltage, and then assemble all the results together.
If you don't understand volts versus ohms, please read up on that subject
for a few minutes before you do your tests

> I set the meter to beep if the circuit was completed. I'm not sure
> what that number measured. If the circuit was completed, the meter
[quoted text clipped - 15 lines]
>> joliett
>> --------

Signature

Posted via a free Usenet account from http://www.teranews.com

Reply to this Message

Mr. Crash Davis - 13 Aug 2006 21:59 GMT

I've got a fan on the way, so I'll be back under there next weekend.
I'll post the
results then.

Thanks!

> ok, so you used the meter on the ohms scale and measured resistance. Now,
> we need you to measure voltage, and then assemble all the results together.
[quoted text clipped - 20 lines]
> >> joliett
> >> --------

Reply to this Message

darthpup - 15 Aug 2006 18:30 GMT

Attach two wires to fan, attach two wires to battery. Observe results!

Reply to this Message