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Discussion Starter · #1 ·
1987 RC AC did work last year, no worky this year. The pump is not cycling, tried a jumper on the low pressure switch, and nothing. Ran jumpers to the pump wiring and the clutch engages, therefore the problem must be the dash switch. My question is: is the whole dash switch bad, or do I have a ground problem? The dash switch was replaced last fall when it wouldn't switch to defrost or heat. Ideas?

Mark
 

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Pull the dash switch and see if one side is power and if the other has a ground. Easiest way to tell...
 

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Discussion Starter · #4 ·
618052

This is the diagram I got off the Allpar sight.
 

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Discussion Starter · #5 ·
Went back out last night with the multi meter and jumpers. With ignition in run, with AC punched up no power to the pump harness. Ran the jumpers to battery, and clutch engaged. My next move is to start following the power from the fuse to where it ends, so the BR wire is the feed to the switch and the DB/YL is power to the clutch?

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