PeachParts Mercedes-Benz Forum - View Single Post - PAG Oil Quantity / Type and Flush Review...Please Read!

dpetryk · #20 07-20-2007, 02:50 PM

Disconnect the plug at the compressor and run a jumper wire to the battery and connect it to the clutch coil connection at the compressor. I use a clip lead long enough to get to the battery positive terminal. Be sure the connection is to the clutch coil. My compressors only have a single connection so you cant make a mistake. If yours has more than one, don't follow my advise. You might damage something. I know some compressors use a shaft speed sensor. Not sure about yours.

I have always just let the system recharge from the source of refrigerant without the compressor until it will not take any more gas. Then the compressor would always come on normally since there was about 90 PSI in the system. Never had to jump around any switches. But then again all my systems are R12 and older than yours.