For 1990-2009 cars

## Lights On Chime Inoperative Buick

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

1. Turn the ignition switch to the OFF position.
2. Disconnect the body control module (MALL) connector C2.
3. Turn the head/park lamp switch to the OFF position.
4. Measure the voltage from connector C2 terminal D5 (harness side) to ground.

Does the voltage measured equal the specified value?

12 V

Go to Step 4

Go to Step 3

3 |

1. Disconnect the lamp control module connector C1 and connector C2.
2. Measure the voltage from the lamp control module connector C1 terminal G to ground.

Does the voltage measured equal the specified value?

12 V

Go to Step 7

Go to Step 6

4 | Inspect MALL module connector C2 for proper terminal contact. Is the contact OK? | -- | Go to Step 5 | --
5 | Replace the MALL module. Refer to Multifunction Alarm, Lock, and Lighting Module in Instrument Panel, Gauges and Console. Is the replacement complete? | -- | Go to Audible Warnings System Check | --
6 | Inspect CKT 242 (RED) for an open or a short to ground. Is the circuit OK? | -- | Go to Audible Warnings System Check | Go to Step 13
7 | Measure the resistance from the lamp control module connector C2 terminal B3 to the MALL module connector C2 terminal D5 (harness side). Does the resistance measured approximately equal the specified value? | 0 ohms | Go to Step 9 | Go to Step 8
8 | Inspect CKT 1785 (LT BLU) for an open. Is the wiring OK? | -- | Go to Audible Warnings System Check | Go to Step 13
9 | Measure the resistance from the lamp control module connector C2 terminal B3 to ground. Does the resistance measured equal the specified value? | OL (Infinite) | Go to Step 11 | Go to Step 10
10 | Inspect CKT 1785 (LT BLU) for a short to ground. Is the wiring OK? | -- | Go to Audible Warnings System Check | Go to Step 14
11 | Inspect the lamp control module connector C2 terminal B3 for proper terminal contact Is the contact OK? | -- | Go to Exterior Lights System Check | --
12 | Repair the open or the short to ground in CKT 242 (RED). Refer to Repairing Damaged Wire Insulation in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --
13 | Repair the open in CKT 1785 (LT BLU). Refer to Repairing Damaged Wire Insulation in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --
14 | Repair the short to ground on CKT 1785 (LT BLU). Refer to Repairing Damaged Wire Insulation in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --

## Lights On Chime Inoperative Oldsmobile

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you peform the Audible Warnings System Check? | -- | Go to Step 2 | Go to Audible Warnings System Check
2 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the body control module (MALL) connector C2.
3. Turn the head/park lamp switch to the OFF position.
4. Measure the voltage from connector C2 terminal D5 (harness side) to ground.

Does the voltage measured equal the specified value?

12 V

Go to Step 4

Go to Step 3

3 |

1. Disconnect the head/park lamp switch connector.
2. Measure the voltage on CKT 240 (ORN) from the head/park lamp switch connector terminal G (Oldsmobile) or terminal E (Pontiac) to ground.

Does the voltage measured equal the specified value?

12 V

Go to Step 7

Go to Step 5

4 | Replace the MALL module. Refer to Multifunction Alarm, Lock, and Lighting Module Replacement in Instrument Panel, Gauges and Console. Is the replacement complete? | -- | Go to Audible Warnings System Check | --
5 | Inspect CKT 240 (ORN) for an open or short to ground. Is the circuit OK? | -- | Go to Step 6 | Go to Step 14
6 | Inspect the in-line connector C200 for proper terminal contact at terminal F11. Is the contact OK? | -- | Go to Audible Warnings System Check | --
7 | Measure the resistance from the head/park lamp switch connector terminal E (Oldsmobile) or terminal F (Pontiac) to the MALL module connector C2 terminal D5 (harness side). Does the resistance measured approximately equal the specified value? | 0 ohms | Go to Step 10 | Go to Step 8
8 | Inspect CKT 1785 (LT BLU) for an open. Is the wiring OK? | -- | Go to Step 9 | Go to Step 15
9 | Inspect the in-line connector C200 for proper terminal contact at terminal A3. Is the contact OK? | -- | Go to Audible Warnings System Check | --
10 | Measure the resistance from the head/park lamp switch connector terminal E (Oldsmobile) or terminal F (Pontiac) to ground. Does the resistance measured equal the specified value? | OL (Infinite) | Go to Step 12 | Go to Step 11
11 | Inspect CKT 1785 (LT BLU) for a short to ground. Is the wiring OK? | -- | Go to Audible Warnings System Check | Go to Step 16
12 | Inspect the head/park lamp switch connector terminal E and terminal G (Oldsmobile ) or terminal E and terminal F (Pontiac) for proper terminal contact. Is the contact OK? | -- | Go to Step 13 | --
13 | Replace the head/park lamp switch. Refer to Head/Park Lamp Switch Replacement in Instrument Panel, Gauges, and Console. Is the replacement complete? | -- | Go to Audible Warnings System Check | --
14 | Repair an open or short to ground in CKT 240 (ORN). Refer to Repairing Damaged Wire Insulation in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --
15 | Repair the open in CKT 1785 (LT BLU). Refer to Repairing Damaged Wire Insulation in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --
16 | Repair the short to ground in CKT 1785 (LT BLU). Refer to Repairing Damaged Wire Insulation in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --

## Lights On Chime Inoperative Pontiac

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Audible Warnings System Check? | -- | Go to Step 2 | Go to Audible Warnings System Check
2 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the body control module (MALL) connector C2.
3. Turn the head/park lamp switch to the OFF position.
4. Measure the voltage from connector C2 terminal D5 (harness side) to ground.

Does the voltage measured equal the specified value?

12 V

Go to Step 4

Go to Step 3

3 |

1. Disconnect the head/park lamp switch connector.
2. Measure the voltage on CKT 240 (ORN) from the head/park lamp switch connector terminal E to ground.

Does the voltage measured equal the specified value?

12 V

Go to Step 7

Go to Step 5

4 | Replace the MALL module. Refer to Multifunction Alarm, Lock, and Lighting in Instrument Panel, Gauges, and Console. Is the replacement complete? | -- | Go to Audible Warnings System Check | --
5 | Inspect CKT 240 (ORN) for an open or a short to ground. Is the circuit OK? | -- | Go to Step 6 | Go to Step 14
6 | Inspect the in-line connector C200 for proper terminal contact at terminal F11. Is the contact OK? | -- | Go to Audible Warnings System Check | Go to Step 15
7 | Measure the resistance from the head/park lamp switch connector terminal F to the MALL module connector C2 terminal D5 (harness side). Does the resistance measured approximately equal the specified value? | 0 ohms | Go to Step 10 | Go to Step 8
8 | Inspect CKT 1785 (LT BLU) for an open. Is the wiring OK? | -- | Go to Step 9 | Go to Step 14
9 | Inspect the in-line connector C200 for proper terminal contact at terminal A3. Is the contact OK? | -- | Go to Audible Warnings System Check | Go to Step 15
10 | Measure the resistance from the head/park lamp switch connector terminal F to ground. Does the resistance measured equal the specified value? | OL (∞) | Go to Step 12 | Go to Step 11
11 | Inspect CKT 1785 (LT BLU) for a short to ground. Is the wiring OK? | -- | Go to Audible Warnings System Check | Go to Step 14
12 | Inspect the head/park lamp switch connector terminal E and terminal F for proper terminal contact. Is the contact OK? | -- | Go to Step 13 | Go to Step 15
13 | Replace the head/park lamp switch. Refer to Head/Park Lamp Switch Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Audible Warnings System Check | --
14 | Repair the wiring. Refer to Repairing Damaged Wire Insulation in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --
15 | Repair the poor terminal contact. Refer to Terminal Repairs in Wiring Systems. Is the repair complete? | -- | Go to Audible Warnings System Check | --