1. Disconnect the blower motor resistor.
2. Turn the ignition switch to the RUN position.
3. Place the heater-A/C control in the VENT position.
4. Place the blower switch in the OFF position.
5. Use a test light to backprobe between the following blower motor resistor harness connector and ground:

•	LO - B (circuit 60)

•	M1 - A (circuit 63)

•	M2 - D (circuit 72)

•	M3 - C (circuit 73)

•	HI - F (circuit 52)

Does the test light illuminate for any of the tests?

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Go to Step 2

Go to Step 5

1. Leave the test light connected to the same terminal that illuminated the test light.
2. Disconnect the heater-A/C control connector C1.

Does the test light illuminate?

--

Go to Step 3

Go to Step 4

Repair the short to B+ in the following circuit:

1. LO - Blower motor resistor harness connector terminal B (circuit 60).
2. M1 - Blower motor resistor harness connector terminal A (circuit 63).
3. M2 - Blower motor resistor harness connector terminal D (circuit 72).
4. M3 - Blower motor resistor harness connector terminal C (circuit 73).
5. HI - Blower motor resistor harness connector terminal F (circuit 52).

Has the repair been made and the system rechecked?

--

System OK

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

Is the repair complete?

--

System OK

--

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

Is the repair complete?

--

System OK

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