If the Clutch is not working on the AC compressor when doing the above, then the problem is in the circuit providing current to the FCM (Fan Control Module). At this point, have someone to do the above as you observe the Clutch on the AC Compressor. Now, do the fans out front run ? (If so, should be on slow speed)ĥ. Push in the AC button (light should come on)Ĥ. Simple test as Oilhammer explained (engine not running)ģ. (engine doesn't need to be running to observe) I guess one other question that needs to be posed, do you know for a fact that the AC Clutch is snapping closed when you turn on the AC. If your fans are running when you hot wire them at the thermo switch, then the brushes are not at fault.
2000 vw beetle coolant engine fan module full#
The high side is full 12 volts by-passing the resistor. The low side "wastes" electric current via a resistor which allows the fan to run slow. They will be the newer updated style, so they may look slightly different, but they'll work at least as long possibly longer than the originals did.Īgain, as I have stated and Oilhammer too, there is a high side and a low side. The aftermarket used to have decent fans available, but lately (the last couple years) they have not. Not only do they not last, they quite often have a habit of coming apart and then you not only get to replace the fan motor again, but you also get to replace the radiator, shroud, bracket, and whatever else it took out. The brown one is the common ground leg, the other two are high and low speeds.Ĭhinacool fans are junk. You can test each speed easily, each fan has three wires.
They WILL come on low speed as soon as the A/C button is switched on, the engine does not even need to be running for this to happen, just turn the key on. They just do not make enough waste heat at no load. The fans won't ever come on at idle on the diesels from coolant temp. The low side can (and usually does) die first, but the high side may be still working.
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