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Old 10-19-2020, 08:37 PM   #1
truckster
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Join Date: Jan 2001
Location: Orem, Utah
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AC Principles of Operation - Electrical

I posted this on the 88-98 board, but things seem kind of dead over there:

I'm installing the AC components from a 98 Silverado in my 72 Blazer with a 5.7 Vortec. I'm using the serpentine belt from 98 as well as all the components for the AC (all new). I want to make sure I'm wiring it right. If I understand correctly, one side of the compressor clutch harness goes to ground. The positive side runs from the relay (via the AC switch) through the low pressure switch as well as through a cycling switch and then to the other side of the clutch harness. One switch is on the accumulator and the other is mounted on the manifold at the rear of the compressor. Is this right?

Thanks in advance.
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