QuestionHi: I just purchased this 2000 Beetle 2.0L and the AC does not work.
First, I tested the power at the AC Compressor connector. I get a constant 4.5 to 6 volts all the time with the car on or off, running or not running.
I assume I am suppose to get 12 volts to run the AC compressor Magnetic Clutch. I hot wired the compressor from the battery to the magnetic compressor clutch and it does not kick in.
I believe I will have to replace the compressor to, but I gotta get the 12 volts to the connector and find out why the constant low voltage which probably burned out the magnetic clutch as the 4.5 to 6 volts are there all the time.
I bought a Heynes Repair Manual and looked at the AC.
From the connector going back towards the AC push switch, one wire goes to ground and the other wire goes to Coolant Fan Controll Module. What ever that is and where it is, I don't know.
I did remove and replace the relays or modules (?) under the dash on the driver's side. The tongues were somewhat corroded and I emeryed them clean. The second one from the left does shut off the blowers and turns off the AC push button light, but everythings the same.
I checked the fan fuse at the fuse panel and that is ok, also I checked the three larger fuses under the hood near the battery and they are good also.
What do you think? Thank you
DoubleNickel
Just found this on the net.
Failure of clutch to operate correctly may be the result of insufficient voltage to coil (12.5 volts required; 10.5 to 10.8 volt minimum with all electrical accessories on), low voltage feedback from blower motor operation, or from other system electrical components.
AnswerHi John;
The blower fan control module is located in the engine bay, near the high speed fan itself. Most A4 type VW's have them right on top of the radiator core support...but not Beetles, I don't think. Get a Bentley manual. Also, get the battery, and battery tray out. Under them, on Beetles there are almost a dozen ground strap connections to every system in the car, including lights. Get them all clean, get the ground area on the body of the car itself clean, and then put it all together. I usually get some petroleum jelly, and cover these grounds to keep them protected for a while longer, but I don't use paint because it may "wick" in and insulate, and cause more problems later. Almost all electrical problems on these cars are associated with a bad ground. You'll have to have the "radio code" to restart the radio, so get that first. Then go back, and check for voltage, and fan control. Hope this works out for you, John. Good luck.
