S2 cooling fan operation
05-22-2014, 02:08 PM
#16
Burning Brakes
Thread Starter
Join Date: Dec 2009
Location: Montreal, Quebec, Canada
Posts: 1,045
Received 0 Likes
on
0 Posts
Painters tape was used to number the wires so I knew where to plug the back after repairing them. I love painters tape almost as much as duct tape.
05-23-2014, 03:19 AM
#17
Rennlist Member
05-23-2014, 06:52 AM
#18
Burning Brakes
Thread Starter
Join Date: Dec 2009
Location: Montreal, Quebec, Canada
Posts: 1,045
Received 0 Likes
on
0 Posts
Drove the car yesterday and the fans now seem to work as they are supposed to. On to the next project.
Thanks everyone for the help and motivation.
Mark
Thanks everyone for the help and motivation.
Mark
10-21-2018, 12:06 AM
#19
Cured
968 Fan Cycling Cured!!
My Porsche dealer couldn’t figure it out but I did: I can say that the 5-7 second fan cycling was caused by a bad connection to the ceramic fan speed resistors on the firewall by the battery under the weather cover directly behind the RH AC pollen filter in my ‘94 968. The default mode for the fans is to cycle from low to high every 5-7 seconds when there is an open circuit. While the connections looked fine at first, the top wire under the insulation and connection was only as thick as a human hair and the ceramic disc had cracked on the back side. I ordered two new ceramic resistors from my Porsche dealership and soldered a new connector to the frayed wire. Now my fans behave as they should and the higher speed fan only comes in when needed No more cycling on and off every 5-7 seconds. No more hearing the relay click on and off every 5-7 seconds! That was driving me crazy for weeks. And it really helps with car’s battery life. Hope this helps!