fresh air fan bad resistor?, defrost fresh air |
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fresh air fan bad resistor?, defrost fresh air |
Medtner3 |
Jan 21 2022, 10:52 PM
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#1
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Member Group: Members Posts: 180 Joined: 7-July 20 From: Cedar Park Member No.: 24,467 Region Association: None |
update: well, the fan was working now not even that is working. I think I might have fried the motor when I was hooking up the leads to test the fan through the resistor prongs I accidentally let the pos and neg cross ... when it rains it pours not going well today
Edited: I took my fresh air box fan out of the car and tested with a 12 V battery and it spins and works. But the resistor does not seem to work: I put 12V positive lead on the upper right pole where power comes in ( I get 11.84 volts on this terminal when the ignition was on) . ... as I understand it the other three poles are ground for the three fan speeds? So I connect each one to ground and the fan does not work assuming I am testing correctly>>>> can you rebuild a resistor or perhaps clean it with contact cleaner and make it work again https://forums.pelicanparts.com/porsche-911...ower-motor.html https://forums.pelicanparts.com/porsche-914...roster-fan.html |
Superhawk996 |
Jan 22 2022, 07:10 PM
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#2
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914 Guru Group: Members Posts: 5,903 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Here is the pin out from the resistor
NOTE: disregard the Ground labeling. Somewhere I had a corrected version of this graphic but can't lay hands on it at the moment. The fan speeds are then controlled by switching the ground path to on of the three other pins (low, med, high). See Haynes Manual for schematic. Here are the operating parameters off my fan. |
Medtner3 |
Jan 22 2022, 08:38 PM
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#3
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Member Group: Members Posts: 180 Joined: 7-July 20 From: Cedar Park Member No.: 24,467 Region Association: None |
Here is the pin out from the resistor NOTE: disregard the Ground labeling. Somewhere I had a corrected version of this graphic but can't lay hands on it at the moment. The fan speeds are then controlled by switching the ground path to on of the three other pins (low, med, high). See Haynes Manual for schematic. Here are the operating parameters off my fan. that is what I had the pin that says "ground" is actually the power pin. I am frustrated dont know why the motor suddenly stopped working I must have screwed it up I can buy a new motor on Pelican for $85 plus tax and shipping ugggh at least they are still available |
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