GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

  

1

Inspect the HEADLAMP circuit breaker.

Is the circuit breaker open?

--

Go to Step 9

Go to Step 2

2

  1. Turn the headlamp switch to the HEAD position.
  2. Using a test light backprobe between C201 terminal E13 and ground.

Does the test light illuminate?

--

Go to Step 8

Go to Step 3

3

Using a test light, backprobe between the headlamp switch harness connector terminal L and ground.

Does the test light illuminate?

--

Go to Step 7

Go to Step 4

4

Using a test light, backprobe between the headlamp switch harness connector terminal N to ground.

Does the test light illuminate?

--

Go to Step 5

Go to Step 6

5

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Has the repair been made?

--

Go to Daytime Running Lights (DRL) System Check

--

6

Repair the poor connection or open in circuit 2440.

Has the repair been made?

--

Go to Daytime Running Lights (DRL) System Check

--

7

Repair the poor connection or open in circuit 10 between the headlamp switch harness connector terminal L and C201 terminal E13.

Has the repair been made?

--

Go to Daytime Running Lights (DRL) System Check

--

8

Replace the headlamp dimmer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in steering wheel and column.

Has the repair been made?

--

Go to Daytime Running Lights (DRL) System Check

--

9

Repair a short to ground in circuit 2440.

Has the repair been made?

--

Go to Daytime Running Lights (DRL) System Check

--