For 1990-2009 cars

## Headlamps Inoperative - Low Beams Chevrolet

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire DRL System Check performed? | -- | Go to Step 2 | Go to Headlight System Check
2 |

1. Ensure that the headlamp switch in the HEAD position.
2. Turn the headlamp dimmer switch to the LOW position.
3. Connect a test light from the headlamp switch connector terminal E to ground.

Does the test light illuminate?

--

Go to Step 3

Go to Step 4

3 | Repair a poor connection or open in circuit 10/12. Is the repair complete? | -- | Go to Step 5 | --
4 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Is the repair complete? | -- | Go to Step 5 | --
5 |

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components removed.

Have all repairs been made?

--

Go to Headlight System Check

--

## Headlamps Inoperative - Low Beams Pontiac

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire DRL System Check performed? | -- | Go to Step 2 | Go to Daytime Running Lights (DRL) System Check
2 |

1. Turn the headlamp switch to the HEAD position.
2. Turn the headlamp dimmer switch to the LOW position.
3. Backprobe with a test light from the headlamp dimmer switch connector terminal B and ground.

Does the test light illuminate?

--

Go to Step 4

Go to Step 3

3 | Repair the poor connection or open in circuit 10. Is the repair complete? | -- | Go to Step 5 | --
4 | Connect a test light between the headlamp dimmer switch connector terminal C and ground. Does the test light illuminate? | -- | Go to Step 6 | Go to Step 7
5 |

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components removed.

Have all repairs been made?

--

Go to Daytime Running Lights (DRL) System Check

--

6 | Repair a poor connection or open in circuit 12. Is the repair complete? | -- | Go to Step 5 | --
7 | Replace the headlamp dimmer switch. Refer to Headlamp Dimmer Switch Replacement. Is the repair complete? | -- | Go to Step 5 | --

## Headlamps Inoperative - Low Beams Scandanavia

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire DRL System Check performed? | -- | Go to Step 2 | Go to Daytime Running Lights (DRL) System Check
2 |

1. Ensure that the headlamps are on.
2. Turn the headlamp dimmer switch to the low beam position.
3. Connect a test light from the headlamp dimmer switch connector terminal B to ground.

Does the test light illuminate?

--

Go to Step 3

Go to Step 4

3 | Connect a test light at the headlamp dimmer switch connector terminal C and ground. Does the test light illuminate? | -- | Go to Step 5 | Go to Step 6
4 | Connect a test light between the headlamp switch connector terminal E and ground. Does the test light illuminate? | -- | Go to Step 8 | Go to Step 9
5 | Repair a poor connection or open in circuit 12. Is the repair complete? | -- | Go to Step 7 | --
6 | Replace the headlamp dimmer switch. Is the repair complete? | -- | Go to Step 7 | --
7 |

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components removed.

Have all repairs been made?

--

Go to Daytime Running Lights (DRL) System Check

--

8 | Repair a poor connection or open in circuit 10. Is the repair complete? | -- | Go to Step 7 | --
9 | Connect a test light between the headlamp switch connector terminal J and ground. Does the test light illuminate? | -- | Go to Step 10 | Go to Step 11
10 | Replace the headlamp switch. Refer to Headlamp Switch Replacement Is the repair complete? | -- | Go to Step 7 | --
11 | Repair a poor connection or open in circuit 702. Is the repair complete? | -- | Go to Step 7 | --