For 1990-2009 cars

#### ind inop-buick

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire Brake Warning System Check performed? | -- | Go to step 2 | Go to Brake Warning System Check
2 | Did the BRAKE indicator illuminate briefly during the bulb check (when the ignition switch transitions from RUN to START)? | -- | Go to step 9 | Go to step 3
3 |

1. Disconnect C202.
2. Connect a test lamp between the C202 terminal B3 (body harness side) and ground.
3. Ignition switch in RUN.

Is the test lamp lit?

--

Go to step 4

Go to step 5

4 | Repair open in the steering column harness, circuit 33 (TAN/WHT) or the ignition switch. Is the repair complete? | -- | Go to Brake Warning System Check | --
5 |

1. Ignition switch in OFF.
2. Disconnect the instrument cluster (Buick w/ UB3 remote indicator bank) connectors.
3. Connect a fused jumper between the;

• | (Buick w/ UB3) remote indicator bank harness connector terminals 17 and 18.

• | (Buick w/ U23) instrument cluster harness connector terminals B1 and A2.

• | (Oldsmobile) instrument cluster harness connector C1 terminal D9 and connector C1 terminal C13.

• | (Pontiac w/ UB3) instrument cluster harness connector terminals B2 and A5.

• | (Pontiac w/ U50/U2F) instrument cluster harness connector C1 terminals A7 and A10.

4. Ignition switch in RUN.

Is the test lamp lit?

--

Go to step 8

Go to step 6

6 | Connect the fused jumper between the;

1. (Buick w/ UB3) remote indicator bank harness connector terminals 18 and battery positive voltage.
2. (Buick w/ U23) instrument cluster harness connector terminals A2 and battery positive voltage.
3. (Oldsmobile) instrument cluster harness connector C1 terminal C13 and battery positive voltage.
4. (Pontiac w/ UB3) instrument cluster harness connector terminals A5 and B+.
5. (Pontiac w/ U50/U2F) instrument cluster harness connector C1 terminals A10 and battery positive voltage.

Is the test lamp lit?

--

Go to step 7

Go to step 11

7 | Repair open in circuit 439 (PNK). Is the repair complete? | -- | Go to Brake Warning System Check | --
8 | Check the instrument cluster (Buick W/ UB3 remote indicator bank) BRAKE indicator and circuit for an open.

• | If the instrument cluster (Buick W/ UB3 remote indicator bank) BRAKE indicator is open, replace the indicator.

• | If the instrument cluster (Buick W/ UB3 remote indicator bank) BRAKE indicator circuit is open, replace the instrument cluster (Buick W/ UB3 remote indicator bank).

Is repair complete?

--

Go to Brake Warning System Check

--

9 |

1. Disconnect the park brake switch.
2. Connect a test lamp between the the park brake switch harness connector terminal A and ground.
3. Ignition switch in RUN.

Is the test lamp lit?

--

Go to step 10

Go to step 11

10 | Replace the park brake switch. Is the repair complete? | -- | Go to Brake Warning System Check | --
11 | Repair open in circuit 33 (TAN/WHT). Is the repair complete? | -- | Go to Brake Warning System Check | --