GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Regal 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Exterior Lights System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Turn the headlamp switch to the PARK position.

The following components are all on:

    • Rear Side Marker
    • Rear park
    • License
    • Tail
    • Front side marker
    • Front park lamps
    • Park Lamps Inoperative- Rear. Refer to Park Lamps Inoperative - Rear
    • Park Lamps are Inoperative-Front. Refer to Park Lamps Inoperative - Front

2
  1. Turn the ignition switch to the RUN position.
  2. Operate the turn signal switch to the left or the right position.

The turn signal lamps and cornering flash continuously on and off.
    • Cornering Lamps Inoperative Cornering Lamps Inoperative
    • Cornering Lamps are Inoperative-One . Refer to Cornering Lamps Inoperative - One
    • Turn Signal Lamps are Inoperative. Refer to Turn Signal Lamps Inoperative
    • Turn Signal Lamps are Inoperative-Left or Right Side. Refer to Turn Signal Lamps Inoperative - Left or Right Side
    • Turn Signal and Hazard Lamps are Inoperative. Refer to Turn Signal and Hazard Lamps Inoperative

3

Turn the turn signal switch to the OFF position.

The turn signal and cornering lamps are off.

Cornering Lamps are Always On. Refer to Cornering Lamps Always On

4
  1. Turn the Ignition to the OFF position.
  2. Turn the hazard switch to the ON position.
    • The front and rear turn signal lamps flash continuously from minimum intensity to maximum intensity.
    • The front marker lamps flash continuously from off to on.
    • Turn Signal and Hazard Lamps Inoperative. Refer to Turn Signal and Hazard Lamps Inoperative
    • Hazard Lamps are Inoperative. Refer to Hazard Lamps Inoperative

5
  1. Turn the hazard switch to the OFF position.
  2. Depress the brake pedal.

The following components are on:

    • Side marker
    • Park
    • License plate lamps

The following components are on at maximum:

    • Center High Mounted Stop Lamp (CHMSL)
    • Tail lamps
    • Stop Lamps all Inoperative. Refer to Stop Lamps Inoperative
    • Stop Lamps Inoperative, CHMSL Operate. Refer to Stop Lamps Inoperative - Center High Mounted Stop Lamp Operates
    • Stop Lamp Inoperative Center High Mounted. Refer to Stop Lamps Inoperative - Center High Mounted

6

Release the brake pedal.
    • The tail lamps go to low intensity.
    • The Center High Mounted Stop Lamp turns off.

Stop Lamps Always On. Refer to Stop Lamps Always On

7

Turn the ignition to the RUN position.

The Daytime Running Lamps (DRL) turns on.

    • Daylight -- the front turn signal lamps are on (non-flashing).
    • Low light -- the front turn signal lamps are off, the low beam headlamps and the park lamps are on.

Daytime Running Lamps (DRL) Inoperative Headlamp Switch Operates Normally Refer to Daytime Running Lamps (DRL) Inoperative, Headlamp Switch Operates Normally

8
  1. Set the park brake.
  2. Turn the ignition to the RUN position.

The Daytime Running Lamps (DRL) are off.

DRL Inoperative, Headlamp Switch Operates Normally. Refer to Daytime Running Lamps (DRL) Inoperative, Headlamp Switch Operates Normally