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Old 10-28-2003, 02:11 AM
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sixto sixto is offline
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,124
There are two pressure switches on the receiver drier behind the left headlight. One breaks the power to the compressor clutch when the pressure is too low, one sends power to the auxiliary fan circuit when the pressure is 'high enough.'

There's also the 105/115C switch on the head near the #4-#5 intake manifold runners. It's a 2-pin temp sensor. At 105C the auxiliary fans come on full tilt, at 115C the compressor is disengaged.

95 S420
91 300SE
87 300SDL
83 300SD

Last edited by sixto; 10-28-2003 at 09:46 PM.
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