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Home >> Jeep >> 2004 >> Wrangler Unlimited >> Repair and Diagnosis >> Engine Performance >> System >> Powertrain Diagnostic Procedures >> DRIVEABILITY - Gas >> *Brake Switch Sense Status Does Not Change On DRBIII(R) >> Possible Causes

Possible Causes

  1. DRBIII(R) DOES NOT SHOW BRAKE SW PRESSED OR RELEASED
  2. (F32) FUSED B+ CIRCUIT OPEN
  3. (Z1) GROUND CIRCUIT OPEN
  4. (K29) BRAKE LAMP SWITCH SIGNAL CIRCUIT
  5. (K29) BRAKE LAMP SWITCH SIGNAL CIRCUIT OPEN
  6. (K29) BRAKE LAMP SWITCH SIGNAL CIRCUIT SHORT TO GROUND
  7. (K29) BRAKE LAMP SWITCH SIGNAL LESS THAN 10.0 VOLTS
  8. (V32) S/C POWER SUPPLY CIRCUIT BELOW 10 VOLTS AT BRAKE SWITCH CONN
  9. PCM