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Radiator Fan Help Needed Please :0)

marksawtell
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marksawtell Member

marksawtell

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I have a1999 porsche 996 c2 and I have noticed only 1 radiator fan is coming on when the car is hot. I have checked the fuses an have tried swapping the l.h.s fuse with the r.h.s fuse for the fans to check it wasnt the fuse. Can anybody tell me where the relays are for the fans and any helpful advice of what this could be and whether there are independent temperature switches for each fan.

Many thanks in advance!

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marksawtell Member

marksawtell

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The relays are above the fuse box.

Each relay position is labeled. These 4 are the in the second row from the bottom - 3rd to 5th positions from the left (19, 20, 21, 22).

post-1-12757425844_thumb.png

Thanks Lauren for a quick reply. What did you mean by "about the fuse box" . Ive looked around and cant see any relays in the footwell.

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marksawtell Member

marksawtell

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Up under the dash - I corrected my typo -- 'above' the fuse box area.

post-1-127574431843_thumb.png

thanks loren... I swapped over the relays and still not got the drivers side working. Looks like it might be the fan itself on that side. Will take it apart this afternoon and test the fan.

Thans again

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Loren Member

Loren

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Up under the dash - I corrected my typo -- 'above' the fuse box area.

post-1-127574431843_thumb.png

thanks loren... I swapped over the relays and still not got the drivers side working. Looks like it might be the fan itself on that side. Will take it apart this afternoon and test the fan.

Thans again

Could be the ballast resistor - fairly common failure.

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Rob001 Member

Rob001

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I had the same problem which I temporary solved by running a small wire between the hi speed and low speed relais of radiator cooling fan which was not working.

See below link from ppbb to determine if it is the fan of balast resistor and how to run the wire to get the fan running on hi speed only.

www.ppbb.com/phorum/read.php?6,1509504,1509681

Rob

Edited by Rob001
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