GM Service Manual Online
For 1990-2009 cars only

Park Lamps Inoperative Domestic

Step

Action

Value(s)

Yes

No

1

Was the Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

Connect an unpowered test lamp between the headlamp switch connector, cavity H for CKT 240 (BRN), and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Repair the open in CKT 240 (BRN) between the instrument panel fuse block and the headlamp switch.

Are all of the park lamps operative?

--

Go to Exterior Lights System Check

Go to Step 4

4

  1. Place the headlamp switch in the park lamps position.
  2. Connect an unpowered test lamp between the headlamp switch connector, cavity S, and ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

Repair the open in CKT 9 (BRN) between the headlamp switch and splice S225.

Are all of the park lamps operative?

--

Go to Exterior Lights System Check

Go to Step 6

6

Replace the headlamp switch.

Are all of the park lamps operative?

--

Go to Exterior Lights System Check

--

Park Lamps Inoperative Export

Step

Action

Value(s)

Yes

No

1

Was the Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

  1. Place the headlamp switch in the park lamps position.
  2. Remove the daytime running lamp rear park lamp relay.
  3. Connect an unpowered test lamp between the daytime running lamp rear park lamp relay connector cavity C2 for CKT 9 (BRN) wire and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

Replace the daytime running lamp rear park lamp relay.

Is the repair complete?

--

Go to Exterior Lights System Check

--

4

Repair the open in CKT 9 (BRN) wire between the daytime running lamp rear park lamp relay connector and S225.

Is the repair complete?

--

Go to Exterior Lights System Check

--