GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Aurora 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake Warning Indicator Always On

Brake Warning Indicator Always On Buick

Step

Action

Value(s)

Yes

No

1

Did you perform the Brake Warning System Check?

--

Go to Step 2

Go to Brake Warning System Check

2
  1. Disconnect the brake fluid level sensor.
  2. Connect a DMM between the brake fluid level sensor harness connector terminal C and battery positive voltage.

Is the measured voltage within the specified range?

12-15V

Go to Step 3

Go to Step 6

3
  1. Disconnect the park brake switch.
  2. Connect a DMM between the park brake switch harness connector terminal A and battery positive voltage.

Is the measured voltage within the specified range?

12-15V

Go to Step 4

Go to Step 7

4
  1. Disconnect the body control module.
  2. Connect a DMM between the body control module harness connector C2, terminal D3 and battery positive voltage.

Is the measured voltage within the specified range?

12-15V

Go to Step 5

Go to Step 8

5

Repair a short to ground in CKT 33 (TAN/WHT).

Did you complete the repair?

--

Go to Brake Warning System Check

--

6

Replace the brake fluid level sensor.

Did you complete the repair?

--

Go to Brake Warning System Check

--

7

Replace the park brake switch.

Did you complete the repair?

--

Go to Brake Warning System Check

--

8

Replace the Body Control Module.

Is the replacement complete?

--

Go to Brake Warning System Check

--

Brake Warning Indicator Always On Oldsmobile

Step

Action

Value(s)

Yes

No

1

Did you perform the Brake Warning System Check?

--

Go to Step 2

Go to Brake Warning System Check

2
  1. Ensure that the park brake is not applied.
  2. Turn the ignition switch to the RUN position.

Is the PARK indictor illuminated?

 

Go to Step 3

Go to Step 9

3
  1. Disconnect the park brake switch.
  2. Connect a DMM between the park brake switch harness connector terminal A and ground.

Is the resistance less than the specified range?

5 ohms

Go to Step 4

Go to Step 12

4
  1. Disconnect the brake fluid level sensor.
  2. Connect the DMM between the brake fluid level sensor harness connector terminal C and ground.

Is the resistance less than the specified range?

5 ohms

Go to Step 9

Go to Step 5

5

Connect the DMM between the brake fluid level sensor harness connector terminal B and ground.

Is the resistance less than the specified range?

5 ohms

Go to Step 6

Go to Step 11

6

Disconnect C202.

Is the resistance less than the specified range?

5 ohms

Go to Step 10

Go to Step 7

7

Connect the DMM between C202 terminal B4 and ground.

Is the resistance less than the specified range?

5 ohms

Go to Step 13

Go to Step 8

8

Repair a short to ground in CKT 33 (TAN/WHT).

Did you complete the repair?

--

Go to Brake Warning System Check

--

9

Repair a short to ground in CKT 209 (PPL).

Did you complete the repair?

--

Go to Brake Warning System Check

--

10

Repair a short to ground in CKT 875 (LT GRN/BLK).

Did you complete the repair?

--

Go to Brake Warning System Check

--

11

Replace the brake fluid level sensor.

Did you complete the repair?

--

Go to Brake Warning System Check

--

12

Replace the park brake switch.

Did you complete the repair?

--

Go to Brake Warning System Check

--

13

Repair a short to ground in the steering column harness or ignition switch.

Did you complete the repair?

--

Go to Brake Warning System Check

--