Fan not running and resistor did not solve problem

[BReyes]

BTW thanks to Loren for valuable info and quality rebuild service on my Motronic ECU and distributor.

On my 996 I was able to identify a fan issue immediately after it stopped working and am now making certain it is the fan. When I saw the temperature rise into the zero of the 180 on the gauge for the first time, I went straight to the front where fans are, and discovered driver's side fan wasn't working. Knowing what to look for helped me identify an issue before it became a problem, not let it get too hot.

I threw in a new resistor and no change. Left nothing right side works on low and high. Have continuity at the fuse. Didn't replace any relays. I bought one but haven't used it. I swapped around the relays from left to right, high to low, and vice versa. No change. Never let it get to 215 degrees. Ran the jumper wires under the relays. No change. Passenger's side fan works on, both, high and low speed, but the driver's side doesn't work at all.

I read about putting 12 volt to it direct yet haven't removed enough parts to where I can test the fan.

Regards,

Edited September 2, 2009 by BReyes

[Stefan]

Here's what I would do:

Start your car, put your finger on the relevant low-speed fan relay, and turn on the A/C. After a brief delay, you should be able to feel the relay click.

If the relay clicks, then you can check to see if voltage is being sent to the front of the car. There is a connector behind the carpeting on each side of the front trunk that connects the relay to the ballast resistor. You can test for voltage there.

If there is voltage at the connector in the front and the ballast resistor is new and installed correctly, then the fan is not working and you will probably need to replace it.

I don't have the wiring diagrams for the 996 (I own a 986) so perhaps someone can chime in with the correct connector pin that carries the electricity to the fan.