Important: Perform the following steps In order to avoid misdiagnosis:

Did you perform the HVAC Air Delivery System Check?

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Go to Step 2

Go to HVAC Compressor Controls System Check

Inspect the fuse block for an open in Fuse 4.

Is Fuse 4 open?

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Go to Step 3

Go to Step 4

1. Locate and repair a short to ground in CKT 41(BRN) .
2. Inspect the system.

Is the repair complete?

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System OK

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1. Disconnect the heater-A/C control connector C2.
2. Place the ignition switch in the RUN position.
3. Use a digital multimeter (DMM) in order to probe between the heater-A/C control harness connector C2 terminal  B7 and terminal B8.

Is the measured voltage within the specified range?

9-14 V

Go to Step 8

Go to Step 5

Use a DMM in order to probe between the heater-A/C control harness connector C2 terminal B7 and ground.

Is the measured voltage within the specified range?

9-14 V

Go to Step 7

Go to Step 6

Locate and repair a poor connection or an open in CKT 41 (BRN) between the fuse block terminal D10 and splice S233.

Is the repair complete?

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System OK

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Locate and repair a poor connection or an open in CKT 150 (BLK) between S213 and G205.

Is the repair complete?

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System OK

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Replace the heater-A/C control. Refer to Control Assembly Replacement .

Is the repair complete?

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System OK

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