GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Does the system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the position lamp.
  2. Turn on the switch that would turn on the position lamp.
  3. Connect a test lamp between the supply voltage circuit of the left position lamp and the ground circuit of the position lamp. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4

Replace the left position lamp.

Did you complete the replacement?

--

Go to Step 8

--

5

Connect a test lamp between the supply voltage circuit of the left position lamp and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

6

Repair a poor connection or an open in the ground circuit of the position lamp. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 8

--

7

Repair a poor connection or an open in the supply voltage circuit of the left position lamp. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3