190D electromagnetic fan clutch - PeachParts Mercedes-Benz Forum

MB_FanAddict · #1 03-10-2004, 10:01 PM

Hello,

The main electromagnet fan on my car has stopped working, I thought it was the three pole temp switch but upon further investigation found it wasn't (the fan wouldn't come on by jumping the connection). The fan clutch is getting 12v but there's no voltage going to the temp switch.

Does anyone have any suggestions on where to start looking?

Thanks,
Chris

190D22 · #2 03-10-2004, 10:05 PM

I know this is of no help... but mine has never worked (at least I have never witnessed it work nor heard it while in the car) since I've owned the car. SO if someone has advice it will help me as well.

MB_FanAddict · #3 03-10-2004, 10:41 PM

190D22,

On the top side of your engine where the upper coolant hose connects to the engine, there should be a red topped one pin switch marked 100c. With the engine running take off it's connecter and ground it with a piece of wire. The fan should begin to spin. If the fan then works and your car has gotten over 100c Without it engaging you know the switch is bad.

Hope this helps you,
Chris

MB_FanAddict · #4 03-11-2004, 08:34 PM

I finally found out what the problem was. One of the wires had corroded at the connection to the fan clutch, so no power went to the temp switch. It took me awhile to trace the wire from the temp switch as it went into the wiring harness for the glow plugs six inches then turned around and went back out to the fan clutch. I resolderd the wire back into the connector, now the fan engages as it should when you jump the temp switch.

Chris

190D22 · #5 03-11-2004, 10:40 PM

Interesting... I hope mine works!