GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Exterior Lights System Check performed?

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Go to Step 2

Go to Exterior Lights System Check

2

  1. Disconnect the underhood lamp connector.
  2. Place the headlamp lamp switch in the PARK position.
  3. Connect a DMM from the underhood lamp connector cavity A (YEL) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 5

3

Connect a DMM from the underhood lamp connector cavity A (YEL) to cavity B (BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 6

4

Replace the underhood lamp. Refer to Underhood Lamp Replacement .

Is the underhood lamp replacement complete?

--

Go to Exterior Lights System Check

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5

Repair the open in CKT 32 (YEL) between the rear junction block and the underhood lamp. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Exterior Lights System Check

--

6

Repair the open in CKT 150 (BLK) between the underhood lamp and G101. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Exterior Lights System Check

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