OLD BLUE 88
Newbie
BTW, installed a larger condenser coil up front from Vintage Air to work better w new AC coolant. Measured air coming out of center vents at 30deg.
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I just completed total AC rebuild on 88 K1500. The two wire pigtail ties into the pressure switch on the back of the R4. I grounded the unused 2nd end of the pigtail, which now allows the recirculate/max air door to operate for the first time in decades. The pressure switch wire breaks out from the larger harness that runs around the front of the block, not back towards the passengers side.
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