Compressor Operation Test
WARNING: This page is about a different car, the 1996 Oldsmobile LSS, 1996 Oldsmobile Eighty-Eight, and 1996 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Compressor operation test measures compressor current draw, compressor output and pressure leak-down.
- Disconnect pressure line from air dryer. Connect Pressure Gauge (J-22124-B ) to air dryer. See Fig 1 . Disconnect compressor connector. Connect Black wire of compressor connector to ground. Install ammeter between Dark Green wire of compressor connector and a 12-volt power source. See Fig 1 . Note compressor motor current draw.
- If compressor does not operate or current draw exceeds 14 amps, replace compressor assembly. If current draw is 14 amps or less, allow pressure to reach 100 psi (7.0 kg/cm2
) and disconnect power supply.NOTE: If compressor is allowed to run to maximum output pressure of 180 psi (12.7 kg/cm2 ), exhaust solenoid valve will act as a relief valve. This gives a false indication of system leakage.
- If pressure holds at 100 psi (7.0 kg/cm2 ), compressor is okay. If pressure decreases to less than 60 psi (4.2 kg/cm2 ), but does not continue to decrease, replace compressor head assembly. If pressure completely leaks off, or builds up but does not reach 100 psi (7.0 kg/cm2 ), check compressor for leaks. See COMPRESSOR LEAK TEST .