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Volkswagen Cabriolet, Scirocco: 1985-1993 coolant fan?


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Last Post: Feb 8, 2013 6:48 PM Last Post By: tcovenant2000
dubnut

Posts: 235
Registered: 01/05/05
coolant fan?
Posted: Feb 6, 2013 10:23 PM
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can't get the fan to run on anything but a ghetto on off toggle :(

new temp switch
checked all the wiring for continuity
even tried hot wiring a separate circuit straight to the battery with spare bit of harness.

seems like I'm missing a plug/part?! it's hi/lo fan wires red/white+ red/black wire coupling (a T shape) up by the fan relay

from the coolant switch- red is the + power and the other two wires are the hi/lo wires going out of the coolant switch right? those two wires (blk/red and wht/red) go up to the relay and then back out to the coolant fan plug which has the ground correct? (the relay clicks when powered up)

any secret MK1 cabby voodoo that I haven't been informed on? common issues with this?!
Thomas or anyone have a wiring diagram off the ( my books were hijacked and taken to texas with tons of other parts... )

tcovenant2000

Posts: 1,802
Registered: 12/09/03
Re: coolant fan?
Posted: Feb 8, 2013 6:48 PM   in response to: dubnut in response to: dubnut
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What year? Do you have AC?

For the basic fan, power comes from battery to switch on rad. Then to fan. - side straight to ground. Sounds like you've got a bad ground. I'd start there.

If you have AC, putting the AC on should run the fan through the AC relay.

Get a voltmeter. Check for 12V going into the rad switch. Try jumpering it out. Follow the ground wire to where it lands. Verify it's making good connection.

Verify your battery to frame, battery to trans, trans to frame grounds are all good.

Thomas

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