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Compressor Will Not Run

  1. Check ground wire and 12 Volt connection to compressor.
  2. Disconnect 12 Volt connection and jumper from battery to compressor.
    • If compressor does not run, replace compressor.
    • If compressor runs, locate open in 12 volt wire.
  3. Place jumper wire between terminal relay and ground.
    • If compressor does not run, replace relay.
    • If compressor runs, disconnect jumper wire and go to step 4.
  4. Check wiring to sensor for security and proper grounding. Make sure adjustment nut is tight and link is properly installed. Check for correct sensor being installed.
    • If all items check out good, go to step 5.
  5. Check height sensor for proper operation.
    • If compressor runs, make adjustment on sensor as necessary.
    • If compressor does not run, go to step 6.
  6. Disconnect height sensor wiring and install test light to ground. Transmission must be in reverse on Eldorado, Riviera and Toronado models. Probe terminals No. 5 and 6 on sensor harness connector.
    • Light should be on at both terminals.
    • If no light, locate open in B+ circuit to sensor.
    • If test light on, go to step 7.
  7. Connect jumper wire to terminal No. 3 and ground.
    • If compressor does not run, check for open in wire between compressor and sensor.
    • If compressor runs, connect jumper wire between terminals 3 and 4. If compressor does not run, repair ground wire from height sensor.
    • If compressor runs with both 3-to-ground and 3-to-4, make height sensor operational check.
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