1. Disconnect the front axle actuator/switch.
2. Ensure the four wheel drive (4WD) control lever is in the two wheel drive (2WD) position.
3. Turn the ignition ON.
4. Turn the engine OFF.
5. Connect a test lamp from terminal C (BRN wire) to ground.

Does the test lamp light?

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Go to Step 3

Go to Step 2

Locate and repair the open in CKT 241 (BRN) between the underhood bussed electrical center and the front axle actuator/switch.

Is the repair complete?

--

System OK

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1. Turn the ignition OFF.
2. Connect a self-powered test lamp from terminal E (BLK wire) to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 4

Locate and repair the open in CKT 2150 (BLK).

Is the repair complete?

--

System OK

--

Connect a self-powered test lamp from terminal B (LT BLU wire) to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 6

Replace the front axle actuator/switch. Refer to Electric Motor Actuator Replacement .

Is the repair complete?

--

System OK

--

1. Disconnect the transfer case switch.
2. Connect a self-powered test lamp from terminal B (LT BLU wire) at the front axle actuator/switch to ground.

Does the test lamp light?

--

Go to Step 9

Go to Step 8

Replace the transfer case switch.

Is the repair complete?

--

System OK

--

Locate and repair CKT 1296 (LT BLU) for a short to ground.

Is the repair complete?

--

System OK

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