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  #1  
Old 07-19-2005, 04:45 PM
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420 SEL condensor elect fans not working

the condensor (electric cooling fans) are not coming on at any engine temperature. Is there a fan relay somewhere, and if so, where? I looked in the relay box in the engine compartment, but none of them are labeled, so I have no idea which one it might be. any ideas?

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Old 07-19-2005, 07:26 PM
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Me too

My fan runs all the time.
So Iam also interested in the location of the relay.
How hot does your car get without the elect. fan?
Ken
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  #3  
Old 07-20-2005, 06:05 AM
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Location: Apex,NC
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aux fan

Hi No year given,some have a one and two stage relay in the fuse box,some have a preresistor and some have a control module in the left front fender low behind the head light.joeym
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Old 07-20-2005, 07:31 AM
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1988 420 sel

I think my relay is at the back left ( looking at the front of the car)
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  #5  
Old 07-20-2005, 07:39 AM
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aux fan

Hi On your 88 you have a aux fan relay an a aux fan preresistor relay both in the fuse box,also you have a resistor below the master cylinder.joeym
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  #6  
Old 07-20-2005, 09:04 AM
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Thanks

I think someone changed the wiring to the aux. fan
If you bypass or jump the resistor will this make the Aux. fan run on high all the time?
Also what does this do?
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420 SEL condensor elect fans not working-contact-bridge.jpg  
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  #7  
Old 07-20-2005, 12:54 PM
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Quote:
Originally Posted by kenalb
My fan runs all the time.
So Iam also interested in the location of the relay.
How hot does your car get without the elect. fan?
Ken
with the AC on, the temp will continue to climb until you turn it off, and the AC will start blowing hot. I usually turn off the AC before the gage gets 3/4 of the way.

the car is a 1990 BTW. thanks.
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  #8  
Old 07-20-2005, 12:56 PM
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Quote:
Originally Posted by joeym
Hi On your 88 you have a aux fan relay an a aux fan preresistor relay both in the fuse box,also you have a resistor below the master cylinder.joeym
what are their locations in the fuse box? mine has no diagram indicating which relays are for what.

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