For 1990-2009 cars

## Instrument Cluster Inoperative Buick

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

1. Turn the ignition switch to the OFF position.
2. Disconnect the instrument cluster connector C1.
3. Measure the resistance from the ground to the following connector C1 terminals:

• | Terminal E7

• | Terminal E12

• | Terminal F12

Are all of the resistance measurements less than the specified value?

5 ohms

Go to Step 4

Go to Step 3

3 | Repair the open in CKT 351 (BLK/WHT) or CKT 150 (BLK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
4 | Measure the voltage from connector C1 terminal E14 and terminal F14 to ground. Do both measurements equal the specified value? | 10-15 V | Go to Step 6 | Go to Step 5
5 | Repair the open in CKT 40 (ORN). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
6 |

1. Turn the ignition switch to the RUN position.
2. Measure the voltage from connector C1 terminal E15 and terminal F15 to ground.

Do both measurements equal the specified value?

10-15 V

Go to Step 8

Go to Step 7

7 | Repair the open or short to ground in CKT 39 (PNK) Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
8 | Inspect the instrument cluster connector C1 for proper terminal contact. Is the terminal contact OK? | -- | Go to Step 9 | Go to Step 10
9 | Replace the instrument cluster. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
10 | Repair the poor terminal contact. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --

## Instrument Cluster Inoperative Oldsmobile

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

1. Turn the ignition switch to OFF.
2. Disconnect the instrument cluster connector C1.
3. Disconnect the instrument cluster connector C2.
4. Measure the resistance from ground to the following terminals:

• | Connector C2 terminal B10

• | Connector C1 terminal C12

• | Connector C1 terminal D12

Are all of the resistance measurements less than the specified value?

5 ohms

Go to Step 4

Go to Step 3

3 | Repair the open in CKT 851 (BLK/WHT) or CKT 150 (BLK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
4 | Measure the voltage from connector C1 terminal D15 to ground. Does the voltage equal the specified value? | 10-15 V | Go to Step 6 | Go to Step 5
5 | Repair the open or short to ground in CKT 40 (ORN). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
6 |

1. Turn the ignition switch to RUN.
2. Measure the voltage from connector C2 terminal B1 to ground.

Is the measured voltage within the specified range?

10-15 V

Go to Step 10

Go to Step 7

7 | Repair the open or short to ground in CKT 439 (PNK) Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
8 | Inspect the instrument cluster connector C1 and connector C2 for proper terminal contact. Are the terminal contacts OK? | -- | Go to Step 9 | Go to Step 14
9 | Replace the instrument cluster. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
10 |

1. Leave the ignition switch in RUN.
2. Measure the voltage from connector C2, terminal A10 to ground.

Is the measured voltage within the specified range?

10-15 V

Go to Step 12

Go to Step 11

11 | Repair the open in CKT 41 (BRN). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
12 |

1. Leave the ignition in RUN.
2. Measure the voltage from connector C2, terminal B11 to ground.

Is the measured voltage within the specified range?

10-15 V

Go to Step 8

Go to Step 13

13 | Repair the open on CKT 39 (PNK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
14 | Repair the poor terminal contact. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --