HVAC Compressor Clutch Does Not Disengage. Pontiac Sun Runner - 4WD (Canada) 1998

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the HVAC System Check performed? | -- | Go to Step 2 | Go to HVAC System Check
2 | Disconnect the A/C compressor clutch relay. Does the compressor clutch relay remain engaged? | -- | Go to Step 3 | Go to Step 5
3 | Test for a short to voltage in the BLK/WHT wire between the A/C compressor clutch relay and the A/C compressor clutch. Does a short to voltage exist? | -- | Go to Step 11 | Go to Step 4
4 | Replace the A/C compressor clutch. Refer to Compressor Clutch Coil and/or Pulley Rim . Is the repair complete? | -- | Go to HVAC System Check | --

5

1. Reconnect the A/C compressor clutch relay.
2. Turn the ignition switch to LOCK.
3. Disconnect the A/C compressor control module connector.
4. Turn the ignition switch to ON.

Does the A/C compressor clutch engage?

--

Go to Step 6

Go to Step 8

6 | Test for a short to ground in the PNK wire between the A/C compressor clutch relay and the A/C compressor control module. Does a short to ground exist? | -- | Go to Step 11 | Go to Step 7
7 | Replace the A/C compressor clutch relay. Refer to Compressor Relay Replacement . Is the repair complete? | -- | Go to HVAC System Check | --

8

1. Make sure that the A/C switch is OFF.
2. Connect a test lamp from A/C compressor control module connector cavity 11 to chassis ground.

Does the test lamp light?

--

Go to Step 10

Go to Step 9

9 | Replace the A/C compressor control module. Refer to Air Conditioning (A/C) Compressor Control Module Replacement . Is the repair complete? | -- | Go to HVAC System Check | --
10 | Test for a short to voltage in the BLU wire between the A/C switch and the A/C compressor control module. Does a short to voltage exist? | -- | Go to Step 11 | Go to Step 12
11 | Repair the short. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to HVAC System Check | --
12 | Replace the A/C switch. Refer to Control Assembly Replacement . Is the repair complete? | -- | Go to HVAC System Check | --