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Compressor Inoperative

NOTE: For connector terminal identification, see WIRING DIAGRAMS  .
  1. Disconnect height sensor connector. Connect a fused jumper wire between ground and Yellow wire terminal (terminal "B") of height sensor connector. If compressor operates, go to next step. If compressor does not operate, go to step 5).
  2. Disconnect fused jumper wire. Connect test light between ground and Orange wire terminal (terminal "C") of height sensor connector. If test light does not come on, repair open in Orange wire. If test light comes on, connect test light between Orange wire and Black wire terminals (terminals "C" and "A") of height sensor connector.
  3. If test light does not come on, repair open in Black wire. If test light comes on, turn ignition switch to RUN position. Connect test light between ground and Pink wire terminal (terminal "D") of height sensor connector.
  4. If test light does not come on, repair open in Pink wire. If test light comes on, check for poor connection at height sensor connector. If connection is okay, adjust height sensor. See HEIGHT SENSOR  under ADJUSTMENTS. Retest system. If system still does not operate, replace height sensor.
  5. Disconnect compressor relay connector. Connect a fused jumper wire between Orange wire and Blue/Green wire terminals (Orange and Black/Green wire terminals on Fleetwood) of compressor relay connector (leave jumper wire connected only as long as necessary to check compressor operation). If compressor operates, go to next step. If compressor does not operate, go to step 7).
  6. Connect a test light between ground and Orange wire terminal of compressor relay connector (terminal No. 5 on Caprice, Impala SS and Roadmaster; terminal No. 85 on Fleetwood). If test light does not come on, repair open in Orange wire. If test light comes on, check for open in Yellow wire between compressor relay and height sensor. If Yellow wire is okay, replace compressor relay.
  7. Connect a test light between ground and Orange wire terminal of compressor relay connector (terminal No. 1 on Caprice, Impala SS and Roadmaster; terminal No. 30 on Fleetwood). If test light does not come on, repair open in Orange wire. If test light comes on, check for open in Black wire between compressor and ground. If Black wire is okay, replace compressor assembly.
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