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Compressor Output

  1. With ignition and all accessories off, deflate system through service valve on compressor. Remove high pressure line at regulator adapter and connect a suitable test gauge (see Figure). Inflate reservoir to 70 psi through service valve and watch test gauge for evidence of leak.
  2. If compressor leaks, remove from vehicle and perform LEAK TEST . If compressor is not leaking proceed as follows: Operate engine at slow idle and observe reservoir pressure buildup for five minutes. Reservoir pressure should build to a minimum of 100 psi (Cadillac) or 90 psi (Buick and Pontiac).
  3. If compressor does not cycle, ensure all lines are open and connected correctly before removing compressor. If pressure buildup is too slow and no restrictions are present in lines, compressor is faulty. If buildup is satisfactory, trouble is in control system.
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