» » »

Cadillac Q&A

Ask Your Question

2003 Cadillac CTS Question: brake lights



, 3.2L V6, Chester, PA, November 24, 2009, 17:44

my brakes lights are out and my traction lights won't go out

3 Answers
Flag This
  • Medium-star Best Answer
    November 25, 2009, 00:47

    If your brake lights won't work niether will your traction control.

    Vehicle Application: 2003 Cadillac CTS 3.2L

    Customer Concern: Left and right brake lights inoperative. Shift interlock intermittently inoperative as well.
    Tests/Procedures: 1. Check battery voltage at stop lamp switch Red/White wire terminal "A". If no voltage, check STOP LP SW fuse.

    2. Check for battery voltage at stop lamp switch White wire terminal "B" with brake pedal applied. If no voltage, replace stop lamp switch.

    3. Check circuit 17 (White wire) integrity from stop lamp switch to stop lamp bulbs. This circuit goes through two splice packs, SP200 and SP302.

    4. Check stop lamp bulb ground circuits for opens/high resistance.

    5. If circuits are OK, check for faulty stop lamp bulbs or sockets.
    Potential Causes: Bulbs
    Stoplamp Switch

    Tech Tips: SP200 is under the instrument panel, above the steering column. SP203 is in the passenger compartment, on the frame rail, left of the driver's seat.

    Flag This
  • Answer #2

    May 10, 2012, 11:37

    Mine was put in the shop for the same thing and i had a bad brake light bulb.

    Flag This
  • Answer #3

    October 28, 2012, 00:40

    My car did this recently. My brake lights (passenger and drivers side as well as 3rd light) were light up constantly and burned out. Replaced bulb- still on constantly. The EBCM went bad and the brake panel lights on dash were illuminated. Replaced EBCM at dealership.

    Flag This