GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Exterior Lights System Check performed?

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Go to Step 2

Go to Exterior Lights System Check

2

  1. Remove the right position lamp deactivation relay from the rear compartment relay center 1.
  2. Place the headlamp switch in the PARK position.
  3. Measure the voltage to ground at the right position lamp deactivation relay terminal D3 (LT BLU/WHT).

Is battery voltage measured?

--

Go to Step 3

Go to Step 6

3

Measure the voltage between the right position lamp deactivation relay terminal D3 (LT BLU/WHT) and terminal C2 (BRN/WHT).

Is battery voltage measured?

--

Go to Step 4

Go to Step 7

4

Measure the voltage to ground at the right position lamp deactivation relay terminal D1 (BLK).

Is battery voltage measured?

--

Go to Step 5

Go to Step 8

5

Measure the voltage between the right position lamp deactivation relay terminal D1 (BLK) and terminal C3 (BLK).

Is battery voltage measured?

--

Go to Step 10

Go to Step 9

6

Repair the open in CKT 1426 (LT BLU/WHT) between the rear compartment relay center 3 and the rear compartment relay center 1. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

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7

Repair the open in CKT 309 (BRN/WHT) between the rear compartment relay center 1 and S145. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

8

Repair the open in CKT 58 (BLK) between the rear compartment relay center 1 and S373. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

9

Repair the open in CKT 750 (BLK) between the rear compartment relay center 1 and S107. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

10

Replace the right position lamp deactivation relay.

Is the repair complete?

--

Go to Exterior Lights System Check

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