I am still trying to sort out this control problem. Sometimes the A/C works perfectly normally ... then the next time I fire it up, the compressor does not come on. It seems to work 2/3 of the times that I run the car. Per notes in the Forum about A/C systems on my car production period, when I bridge the contacts on the drier with the conns off and the ignition on, the compressor should "click." Also, one note in re another model of the late 80's said the aux fan should also start at the same time, if the drier connections are shorted for that test?? Are both of these results true for my particular car model??

Thanks, Ben Carter

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Ben Harrison Carter
1999 Mercedes ML320 87K
1992 Mercedes 300CE 89K
1995 Corvette 29K -- Sold Dec 09
1989 Mercedes 420SEL 99K -- (Sold 4/08)
1968 Mercedes 230S (106K) (Sold 9/06))
1976 Mercedes 450SEL 130K (Just sold - 06)
1961 Mercedes 220Sb (sold years ago)