1. Set the headlamp dimmer switch to the LO position.
2. Observe the headlamps.

Did the headlamp low beam filaments light?

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Go to Step 2

Go to Step 4

1. Set the headlamp switch to OFF.
2. Set the headlamp dimmer switch to the HI position.
3. Disconnect the headlamp dimmer switch harness connector.
4. Connect a DMM between terminals A and D in the headlamps dimmer switch.

Does the DMM indicate continuity?

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Go to Step 3

Go to Step 5

Locate and repair the open in CKT 11 (LT GRN) between terminal A in the headlamps dimmer switch harness connector and terminal B in the right headlamp harness connector.

Is the repair complete?

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System OK

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Locate and repair the open in CKT 150 (BLK) between S105 and G101 (Diesel) or G102 (Gasoline).

Is the repair complete?

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System OK

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Replace the headlamps dimmer switch.

Is the repair complete?

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System OK

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