Was the HVAC Compressor Controls System Check performed?

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Go to Step 2

Go to HVAC Compressor Controls System Check

1. Start the engine.
2. Disconnect the air conditioning (A/C) switch connector.

Does the A/C compressor clutch engage?

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Go to Step 4

Go to Step 3

Replace the A/C switch. Refer to Air Conditioning (A/C) Cooling Fan Switch Replacement .

Is the repair complete?

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Go to HVAC Compressor Controls System Check

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1. Disconnect the A/C compressor control module connector.
2. Connect a test lamp from the A/C switch connector terminal 2 to ground.

Does the test lamp light?

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Go to Step 5

Go to Step 6

Repair the short to voltage in the BLU/WHT wire between the A/C switch and the A/C compressor control module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to HVAC Compressor Controls System Check

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1. Remove the relay box cover.
2. Remove the A/C compressor clutch relay. Refer to Compressor Relay Replacement .
3. Remove the A/C condenser fan relay. Refer to Condenser Fan Relay Replacement .

Does the compressor clutch engage?

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Go to Step 7

Go to Step 8

Repair the short to voltage in the BLK/RED wire between the following components:

Is the repair complete?

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Go to HVAC Compressor Controls System Check

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Reconnect the A/C condenser fan relay. The A/C compressor clutch should not engage.

Does the A/C compressor clutch engage?

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Go to Step 9

Go to Step 10

Replace the A/C condenser fan relay. Refer to Condenser Fan Relay Replacement .

Is the repair complete?

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Go to HVAC Compressor Controls System Check

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Test for a short to ground in the PNK wire between the A/C compressor clutch relay terminal 2 and the A/C compressor control module terminal 7.

Is the resistance less than the specified value?

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Go to Step 11

Go to Step 12

Repair the short to ground in the PNK wire between the A/C compressor clutch relay and the A/C compressor control module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to HVAC Compressor Controls System Check

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Reconnect the A/C compressor clutch relay. The A/C compressor clutch should not engage.

Does the A/C compressor clutch engage?

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Go to Step 13

Go to Step 14

Replace the A/C compressor clutch relay. Refer to Compressor Relay Replacement .

Is the repair complete?

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Go to HVAC Compressor Controls System Check

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Replace the A/C compressor control module. Refer to Air Conditioning (A/C) Compressor Control Module Replacement .

Is the repair complete?

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Go to HVAC Compressor Controls System Check

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