For 1990-2009 cars

## Instrument Cluster Inoperative Pontiac with U50/U2F

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Instrument Cluster 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. Turn the ignition switch to the RUN position.
4. Measure voltage from the instrument cluster connector C1 terminal A7 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 4

Go to Step 3

3 | Inspect CKT 439 (PNK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 17
4 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the instrument cluster connector C2.
3. Turn the ignition switch to the RUN position.
4. Measure voltage from the instrument cluster connector C2 terminal A10 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 6

Go to Step 5

5 | Inspect CKT 439 (PNK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 17
6 |

1. Measure voltage from the instrument cluster connector C2 terminal A10 to connector C1 terminal B8.
2. Measure voltage from the instrument cluster connector C2 terminal A10 to connector C1 terminal B9.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 8

Go to Step 7

7 | Inspect CKT 451 (BLK/WHT) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 18
8 | Measure voltage from the instrument cluster connector C2 terminal A10 to connector C1 terminal A14. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 10 | Go to Step 9
9 | Inspect CKT 1250 (BLK) for an open. Is the wiring OK? | -- | Go to Step 20 | Go to Step 19
10 | Measure voltage from the instrument cluster connector C1 terminal A1 to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 12 | Go to Step 11
11 | Inspect CKT 40 (ORN) for an open. Is the wiring OK? | -- | Go to Step 20 | Go to Step 22
12 | Measure voltage from the instrument cluster connector C1 terminal B1 to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 14 | Go to Step 13
13 | Inspect CKT 40 (ORN) for an open between splice S214 and the instrument cluster. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 22
14 |

1. Turn the headlamp switch to the PARK position.
2. Measure voltage from the instrument cluster connector C1 terminal B12 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 16

Go to Step 15

15 | Inspect CKT 32 (YEL) for an open. Is the wiring OK? | -- | Go to Step 20 | Go to Step 23
16 |

1. Inspect instrument cluster connector C1 for proper terminal contact at the following terminals:

• | A7

• | B8

• | B9

• | A1

• | B1

• | B12

• | A14

2. Inspect the instrument cluster connector C2 for proper terminal contact at the following terminals:

• | A10

• | A1

Are all of the connector terminal contacts OK?

--

Go to Step 25

Go to Step 24

17 | Repair the open in CKT 439 (PNK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
18 | Repair the open in CKT 451(BLK/WHT). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
19 | Repair the open in CKT 1250 (BLK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
20 | Inspect connector C200 for proper terminal contact at terminal F12. Is the terminal contact OK? | -- | Go to Instrument Cluster System Check | --
21 | Repair the poor terminal contact. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
22 | Repair the open in CKT 40 (ORN). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
23 | Repair the open in CKT 32 (YEL). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
24 | Repair the poor terminal contact. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
25 | Replace the instrument cluster. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --

## Instrument Cluster Inoperative Buick

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

1. Turn the ignition switch to OFF.
2. Disconnect the instrument cluster connector.
3. Turn the ignition switch to RUN.
4. Measure the voltage from the instrument cluster connector terminal B1 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 4

Go to Step 3

3 | Inspect CKT 439 (PNK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 11
4 | Measure the voltage from the instrument cluster connector terminal B9 to ground (w/UB3) or terminal B5 (w/U23) to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 6 | Go to Step 5
5 | Inspect CKT 439 (PNK) for an open between splice S299 and the instrument cluster. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 13
6 | Measure the voltage from the instrument cluster connector terminal B3 to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 8 | Go to Step 7
7 | Inspect CKT 439 (PNK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 13
8 | Measure the voltage from the instrument cluster connector terminal B1 to terminal B6 and terminal B7. Does the measured voltage equal the specified value in both cases? | 10-15 V | Go to Step 10 | Go to Step 9
9 | Inspect CKT 451 for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 14
10 | Inspect the instrument cluster connector for proper terminal contact at the following terminals:

• | Terminal B1

• | Terminal B3

• | Terminal B6

• | Terminal B7

• | Terminal B9

Are the connectors OK?

--

Go to Step 12

Go to Step 15

11 | Repair the open in CKT 439 (PNK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
12 | Replace the instrument. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
13 | Repair the open to CKT 439 (PNK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
14 | Repair the open to CKT 451 (BLK/WHT). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
15 | Repair the poor terminal contact. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --

## Instrument Cluster Inoperative Pontiac with UB3

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

1. Turn the ignition switch to OFF.
2. Disconnect the instrument cluster connector.
3. Turn the ignition switch to RUN.
4. Measure the voltage from the instrument cluster connector terminal A6 and terminal B2 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 3

Go to Step 13

3 | Measure the voltage from the instrument cluster connector terminal B2 to terminal B3. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 7 | Go to Step 4
4 | Inspect CKT 1250 (BLK) for an open. Is the wiring OK? | -- | Go to Step 6 | Go to Step 5
5 | Repair the open to CKT 1250 (BLK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
6 | Inspect the in-line connector C200 terminal F12 for proper terminal contact. Is the contact OK? | -- | Go to Instrument Cluster System Check | Go to Step 21
7 | Measure the voltage from the instrument cluster connector terminal B2 to terminal A8 and terminal A17. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 11 | Go to Step 8
8 | Inspect CKT 451 (BLK/WHT) for an open. Is the wiring OK? | -- | Go to Step 10 | Go to Step 9
9 | Repair the open to CKT 451 (BLK/WHT) for an open. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
10 | Inspect the in-line connector C200 terminal H11 for proper terminal contact. Is the contact OK? | -- | Go to Instrument Cluster System Check | Go to Step 21
11 | Measure the voltage from the instrument cluster connector terminal B4 to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 12 | Go to Step 13
12 | Measure the voltage from the instrument cluster connector terminal A15 to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 14 | Go to Step 13
13 | Inspect CKT 439 (PNK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 19
14 |

1. Turn the ignition switch to OFF.
2. Measure the voltage from the instrument cluster connector terminal B9 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 18

Go to Step 15

15 | Inspect CKT 40 (ORN) for an open. Is the wiring OK? | -- | Go to Step 17 | Go to Step 16
16 | Repair the open to CKT 40 (ORN). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
17 | Inspect connector C200 terminal D4 for proper terminal contact. Is the contact OK? | -- | Go to Instrument Cluster System Check | Go to Step 21
18 | Inspect the instrument cluster connector for proper terminal contact at the following terminals:

• | Terminal A6

• | Terminal A15

• | Terminal B2

• | Terminal B4

• | Terminal B9.

Are the connectors OK?

--

Go to Step 20

Go to Step 21

19 | Repair the open on CKT 349 (PNK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
20 | Replace the instrument. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
21 | 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 Instrument Cluster System Check
2 |

1. Turn the ignition switch to OFF.
2. Disconnect the instrument cluster connector C1.
3. Turn the ignition switch to RUN.
4. Measure the voltage from the instrument cluster connector C1 terminal D9 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 4

Go to Step 3

3 | Inspect CKT 439 (PNK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 17
4 |

1. Turn the ignition switch to OFF.
2. Disconnect the instrument cluster connector C2.
3. Turn the ignition switch to RUN.
4. Measure the voltage from the instrument cluster connector C2 terminal F16 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 6

Go to Step 5

5 | Inspect CKT 439 (PNK) for an open between splice S299 and the instrument cluster. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 19
6 | Measure the voltage from the instrument cluster connector C2 terminal F16 to terminal F7 and terminal F8. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 8 | Go to Step 7
7 | Inspect CKT 451 for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 20
8 | Measure the voltage from the instrument cluster connector C2 terminal F16 to terminal E11 and terminal E12. Does the measured voltage equal the specified value in both cases? | 10-15 V | Go to Step 10 | Go to Step 9
9 | Inspect CKT 1250 (BLK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 21
10 | Measure the voltage from the instrument cluster connector C2 terminal F5 to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 12 | Go to Step 11
11 | Inspect CKT 439 (PNK) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 19
12 | Measure the voltage from the instrument cluster connector C2 terminal F4 to ground. Does the measured voltage equal the specified value? | 10-15 V | Go to Step 14 | Go to Step 13
13 | Inspect CKT 147 (LT GRN) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 22
14 |

1. Turn the ignition switch to OFF.
2. Measure the voltage from the instrument cluster connector C1 terminal F3 to ground.

Does the measured voltage equal the specified value?

10-15 V

Go to Step 16

Go to Step 15

15 | Inspect CKT 40 (ORN) for an open. Is the wiring OK? | -- | Go to Instrument Cluster System Check | Go to Step 23
16 |

1. Inspect the instrument cluster connector C1 terminal D9 for proper terminal contact.
2. Inspect the instrument cluster connector C2 for proper terminal contact at the following terminals:

• | Terminal E11

• | Terminal E12

• | Terminal F3

• | Terminal F4

• | Terminal F7

• | Terminal F8

• | Terminal F16

• | Terminal B1

• | Terminal B3

• | Terminal B6

• | Terminal B7

• | Terminal B9

Are the connectors OK?

--

Go to Step 18

Go to Step 24

17 | Repair the open in CKT 439 (PNK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
18 | Replace the instrument. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
19 | Repair the open in CKT 439 (PNK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
20 | Repair the open in CKT 451 (BLK/WHT). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
21 | Repair the open in CKT 1250 (BLK). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
22 | Repair the open in CKT 147 (LT GRN). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
23 | Repair the open in CKT 40 (ORN). Did you complete the repair? | -- | Go to Instrument Cluster System Check | --
24 | Repair the poor terminal contact. Did you complete the repair? | -- | Go to Instrument Cluster System Check | --