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Rattling A/C compressor, added 2 oz. oil charge, rattle stopped momentarily.
Looked at clutch on compressor- it had only 1 of 3 rubber cushions left....
Replaced with a used/good clutch unit- worked / cooled at idle then test drove-and then compressor clutch stopped engagement.
Bought new a/c clutch and installed/gapped properly- no worky!!!!
OK, after rain stopped I tested low and high pressure switches, 12 volts at each connector.
Ohm test on low press switch shows continuity. Voltage test at Low press switch
while Hi pressure connector was off showed no voltage (no continuity while dis-connected, therefore Hi pressure switch is good.)
No volts at a/c clutch connector- wiring or resistor is bad?, I believe resistor is IN wiring harness near a/c clutch connection???
I would also be suspicious of your compressor. At least my experience has been that the clutches don't wear out until the compressor is having issues and dragging on the clutch. Nothing to loose at this point by just running it, but if your AC is anemic this could be the issue. With a depressurized system you can disconnect the small end fitting to the evaporator core and pull the orifice tube. If you have glitter like stuff in it, your compressor is shot and the system needs to be flushed to get the grit out.
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