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Re: New theory regarding a/c electrical woes... Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: New theory regarding a/c electrical woes..., Patrick in Abq, Wed, 1 Jun 2005 07:35:03 Members do not see ads below this line. - Help Keep This Site Online - Signup |
It's actually 3 switches in that one switch body.
You have the wires numbered 1-4
1=green/white
2=Yellow/white
3=blue
4=black
1-2 turns on (closed circuit) A/C comp clutch relay when pressure is above ~2 bar (A/C system filled) and opens again when pressure rise above 27 bar (turning off compressor for safety/cooling reasons).
3-4 turns on (closed circuit) the cooling fan when pressure is above 15 bar and open up when pressure drops below 11 bar.
You also probably have a high pressure switch on the bottom of A/C condenser that turns on high speed cooling fan if the A/C pressure goes too high.
The high pressure switch close at 22 bar and turns on the high speed fan.
Hope this helps in your fault tracing.
Anders
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