Brake Switch Signal

1998 Acura Integra RS, AutomaticSECTION Brake Switch Signal
  1. Check brakelight operation. If brakelights operate properly, go to step 3). If brakelights stay on continuously, check for continuity between brakelight switch terminals "B" and "C". See Fig 1 or Fig 2. Repair or replace switch as necessary. If brakelights do not come on when brake pedal is depressed, check STOP LIGHT, HORN fuse located in underhood fuse/relay box. See FUSE IDENTIFICATION . See WIRING DIAGRAMS article.
  2. If fuse is okay, repair open in wire between fuse and brakelight switch. If wire is okay, check brakelight switch. If fuse in not okay, repair short in wire between fuse and brakelight switch. Replace STOP LIGHT, HORN fuse.
  3. Depress brake pedal and backprobing, measure voltage between the specified PCM terminals. See BRAKE SIGNAL TESTING . See Figure or Figure. Also, refer to the wiring diagrams in the appropriate WIRING DIAGRAMS article. If battery voltage exists, brake signal is okay. If battery voltage does not exist, repair open in Green/White or White/Green wire between PCM connector and brake switch.
FUSE IDENTIFICATION

Application Fuse No. (Amps)
Integra 52 (20)
2.3CL & 3.0CL 30 (20)
2.5TL 30 (20)
3.2TL 2 (20)
3.5RL 39 (15)
BRAKE SIGNAL TESTING

Application Measure Between PCM Connector Terminals
Integra A9 (BRN/BLK) & D5 (WHT/GRN)
2.3CL & 3.0CL A32 (GRN/WHT) & B20 (BRN/BLK)
2.5TL A26 (BRN/BLK) & D12 (GRN/WHT)
3.2TL & 3.5RL A26 (BRN/BLK) & E2 (GRN/WHT)
Fig 1: Brake Light Switch Terminals (Without Cruise Control)
G98A11346Courtesy of AMERICAN HONDA MOTOR CO., INC.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.