Place the blower speed switch in the failing speed position.

Is MED speed the failing speed?

--

Go to Step 2

Go to Step 3

Locate and repair the open in CKT 192 (BLU/RED) between the blower resistor and the HVAC mode switch.

Is the repair complete?

--

System OK

Go to Step 3

1. Disconnect the connector at the blower motor resistor.
2. Place the ignition switch in the RUN position.
3. Place the blower speed switch in the failing speed position.
4. Connect a J39200 between the blower motor resistor connector terminal for the failing position and the wire and chassis ground. The following are the failing positions:

•

LOW-1

•

MED LOW-4

•

MED-HI-6

Does the DMM indicate continuity?

--

Go to Step 4

Go to Step 5

Replace the blower motor resistor. Refer to Blower Motor Resistor Replacement .

Is the repair complete?

--

System OK

Go to Step 5

1. Disconnect the A/C mode switch connector.
2. Connect a test lamp between connector C 3 terminal 2 and chassis ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 7

Locate and repair the open in the wire between the blower resistor and the A/C mode switch.

Is the repair complete?

--

System OK

Go to Step 7

Replace the A/C mode switch. Refer to Control Assembly Replacement .

Is the repair complete?

--

System OK

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