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-   -   E320 Cooling Problems (http://www.peachparts.com/shopforum/showthread.php?t=36996)

jm124 08-14-2009 01:40 PM

Thanks Jas2wa.

Just ot answer your question Cal. No thw 2 aux fans do not come on at all. even when the blue switch is pulled.

Cal Learner 08-14-2009 04:18 PM

Check fuse 7. Try jumpering the pigtail leads from the red pressure switch at the A/C drier (key on engine off). That should give lo aux fans. If no fans, tap on the fan hubs to make sure they're not stuck. If still no, bring jumper from battery + to the two-wire side of the series resistor located behind the driver side headlight. That bypasses all of the aux fan circuit except the wiring between the resistor and the fan motors. If still no, the wire between is bad or both fan motors are bad. If that turns on the fans, you've verified that the fan motors are good, the problem is upstream in the circuit. Check the blue and green relays that each have a fuse on top that are discussed earlier in this thread. I think the relays are located in the relay box at the back of the main fuse box. These relays power the lo and hi fans.

Arthur Dalton 08-14-2009 06:14 PM

<. Try jumpering the pigtail leads from the red pressure switch at the A/C drier (key on engine off). That should give lo aux fans. If no fans, tap on the fan hubs to make sure they're not stuck. If still no, bring jumper from battery + to the two-wire side of the series resistor located behind the driver side headlight. That bypasses all of the aux fan circuit except the wiring between the resistor and the fan motors. If still no, the wire between is bad or both fan motors are bad. If that turns on the fans, you've verified that the fan motors are good, the problem is upstream in the circuit.>>

I know a guy here that writes instructions just like that...

Cal Learner 08-15-2009 08:24 AM

Quote:

Originally Posted by Arthur Dalton (Post 2270278)
I know a guy here that writes instructions just like that...

Yeah, I was paying attention when you described it the first 3,000 times. :)

Arthur Dalton 08-15-2009 11:01 AM

Quote:

Originally Posted by Cal Learner (Post 2270587)
Yeah, I was paying attention when you described it the first 3,000 times. :)

That's how many times it takes.

jm124 08-17-2009 01:27 PM

I swiched the relays as they were reversed.

So ONE of the fans started to work after tapping it a few times. But a few hours later it doesn't turn at all anymore!?

jas2wa 08-25-2009 05:00 PM

wouldn't you know...
 
I have come full circle with my cooling issues. Per the dealer, the high pressure switch that turns on the twin electric fans is bad, and the fans themselves are toast, too. One turns (but apparently not fast enough) and the other is dead.

$700 for the entire twin fan assembly??

Are these indivudual fan units replaceable themselves (for what looks to be about 140/each)?

Cal Learner 08-28-2009 09:10 AM

Quote:

Originally Posted by jas2wa (Post 2278410)
Are these individual fan units replaceable themselves (for what looks to be about 140/each)?

Yes. P/N 000-500-85-93 available for about $250 each from dealer or about half that from online vendor.


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