Was the Heater Blower Controls System Check performed?

--

Go to Step 2

Go to Heater Blower Controls System Check

1. Place the heater and A/C controller mode switch in the OFF position.
2. Place the heater and A/C controller blower motor switch in the HI position.
3. Disconnect blower motor resistor/relay connector.
4. Place the ignition switch in the RUN position.
5. Connect an unpowered test lamp between the blower motor resistor/relay connector, cavity B for CKT 52 (ORN), and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

1. Disconnect the heater and A/C controller C1 connector.
2. Connect an unpowered test lamp between the heater and A/C controller pin A, and ground.

Does the test lamp light?

--

Go to Step 11

Go to Step 10

Connect an unpowered test lamp between the blower motor resistor/relay connector, cavity F for CKT 72 (LT BLU), and ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

1. Disconnect the heater and A/C controller C2 connector.
2. Connect an unpowered test lamp between the heater and A/C controller pin C, and ground.

Does the test lamp light?

--

Go to Step 11

Go to Step 13

Connect an unpowered test lamp between the blower motor resistor/relay connector, cavity D for CKT 63 (TAN), and ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 8

1. Disconnect the heater and A/C controller connector C2.
2. Connect an unpowered test lamp between the heater and A/C controller pin B, and ground.

Does the test lamp light?

--

Go to Step 11

Go to Step 14

Connect an unpowered test lamp between the blower motor resistor/relay connector, cavity E for CKT 60 (YEL), and ground.

Does the test lamp light?

--

Go to Step 9

Go to Step 17

1. Disconnect the heater and A/C controller connector C.
2. Connect an unpowered test lamp between the heater and A/C controller pin A, and ground.

Does the test lamp light?

--

Go to Step 10

Go to Step 14

1. Disconnect the heater and A/C controller connector C2.
2. Connect an unpowered test lamp between the heater and A/C controller connector C2, cavity G, and ground.

Does the test lamp light?

--

Go to Step 16

Go to Step 12

Replace the heater and A/C controller.

Refer to Control Assembly Replacement .

Is the repair complete?

--

Go to Heater Blower Controls System Check

--

Repair the short to voltage in CKT 52 (ORN) between the heater and A/C controller, and the blower motor resistor/relay.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Heater Blower Controls System Check

--

Repair the short to voltage in CKT 72 (LT BLU) between the heater and A/C controller, and the blower motor resistor/relay.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Heater Blower Controls System Check

--

Repair the short to voltage in CKT 63 (TAN) between the heater and A/C controller and the blower motor resistor/relay.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Heater Blower Controls System Check

--

Repair the short to voltage in CKT 60 (YEL) between the heater and A/C controller and the blower motor resistor/relay.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Heater Blower Controls System Check

--

Repair the short to voltage in CKT 119 (WHT) between the heater and A/C controller connectors C1, and C2.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to Heater Blower Controls System Check

--

Replace the blower motor resistor/relay.

Refer to Blower Motor Resistor Replacement .

Is the repair complete?

--

Go to Heater Blower Controls System Check

--