fresh air fan bad resistor?, defrost fresh air Options

[Medtner3]

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

[emerygt350]

Need some advice before I put my gas tank back in the car .

My fresh air box is not working well. The top slider does not go all the way to the left and does not go all the way to the right.

Most of all the cables in the valves on the drivers side and the passenger side valves seem very stiff and does move easily

Also, the fan does not come on. Is there a fuse for that? it's plugged in so I am guessing I need to pull the airbox and test the fan?

Have you cleaned up the top of the sliders? Often 50 years of cigarette ashes turns it into a mess. Fairly certain that is why your fan isn't working. Get some electronics cleaner, pull the ashtray and give it a good clean

[Medtner3]

I sprayed contact cleaner on the slider on top and nothing. Does the car have to be running to work or just ignition in on position

There is 11.84 V on the plug top right which connects to the fan. Tried spinning the fan and nothing