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Service Indicator & Warning Lights Buick Roadmaster VIII

Procedures 7 illustrations ~833 words

ENGINE OIL LIFE MONITOR RESET - 1995-96 MODELS

The CHANGE OIL warning light on the instrument panel is a reminder to change the vehicles oil. This light is controlled by the PCM on 1995-96 models and is reset by performing the following

  1. The light must be reset each time the oil in the vehicle has been changed, whether it was on prior to the oil change or not.
  2. Turn the ignition switch to the ON position, but DO NOT start engine.
  3. Fully depress the accelerator pedal to wide open throttle (WOT) position and release it three (3) times within five (5) seconds.
  4. If the CHANGE OIL light flashes then goes out, the system has been reset.
  5. If the CHANGE OIL does not reset, turn the ignition switch to the OFF position and repeat procedure.

Scheme 1

Scheme 1
Scheme 1

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4
Scheme 4

Note. The CHANGE OIL light shown for the Roadmaster is only on 1994-95 models.

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

OIL PRESSURE INDICATOR

Light indicates low engine oil pressure, but does not indicate amount of oil in engine. Light should come on as a bulb check when ignition switch is in ON position, but should go out after engine is started. Have the system checked and serviced if light remains on or comes on while driving. DO NOT operate vehicle until cause is located and corrected.

ALTERNATOR (CHARGING SYSTEM) LIGHT

Light should come on when ignition switch is in ON position, but should go out after engine is started. If light remains on or comes on when engine is running, have the system checked and serviced as soon as possible.

ENGINE COOLANT TEMPERATURE LIGHT

Light is designed to come on briefly when engine is first started as a bulb check. If it remains on or comes on while driving, it indicates a potential engine overheating condition. Stop vehicle operation as soon as possible.

LOW COOLANT WARNING LIGHT (IF EQUIPPED)

Warning light is designed to come on if engine coolant level is low by 3 quarts or more. Continued operation of vehicle in this condition without adding coolant may result in engine damage due to overheating. Light will also come on briefly during engine starting as a bulb check. Check fuse and bulb if light fails to come on as described.

BRAKE WARNING LIGHT

Vehicle is equipped with dual braking system, which provides back-up braking capability should failure occurs in either half of the hydraulic system. If there is failure in either half of dual braking system, warning light will come on when brake pedal is depressed. In such case, have system checked and serviced as soon as possible. Light should come on briefly as a bulb check when engine is first started. Light will also come on with ignition switch in ON position and parking brake applied.

ANTI-LOCK BRAKE WARNING LIGHT (IF EQUIPPED)

Warning light comes on if there is a malfunction in the rear brake lock-up system. If a malfunction occurs in anti-lock brake system, conventional brake system will still operate normally but without anti-lock assistance. Light is designed to come on briefly as a bulb check with ignition switch in ON position; light should go out after engine is started. If light remains on or comes on while driving, have system checked and serviced.

SERVICE ENGINE SOON/CHECK ENGINE WARNING LIGHT

SERVICE ENGINE SOON or CHECK ENGINE warning light indicates a malfunction in engine control system. If functioning correctly, light comes on when ignition is turned on and goes out after engine is started.

If light does not come on as described or comes on with engine running, have system checked and serviced. Prolonged vehicle operation without having system serviced could affect fuel economy and driveability; emission control system may also be damaged.

SERVICE ENGINE SOON or CHECK ENGINE warning light indicates a malfunction in engine control system. If functioning correctly, light comes on when ignition is turned on and goes out after engine is started.

If light does not come on as described or comes on with engine running, have system checked and serviced. Prolonged vehicle operation without having system serviced could affect fuel economy and driveability; emission control system may also be damaged.

ENGINE OIL LIFE MONITOR RESET - 1994 MODELS

The CHANGE OIL warning light on the instrument panel is a reminder to change the vehicles oil, and is reset by

  1. The light must be reset each time the oil in the vehicle has been changed, whether it was on prior to the oil change or not.
  2. Locate Oil Change Reset Button on the left side of the instrument panel, next to the fuse panel. (Scheme 7)
  3. Turn the ignition switch to the RUN position, but DO NOT start engine.
  4. Fully depress the reset button and hold for five seconds.
  5. If the CHANGE OIL light flashes then goes out, the system has been reset.
  6. If the CHANGE OIL does not reset, turn the ignition switch to the OFF position and repeat procedure.

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