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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Warning Indicator Always On >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the scan tool, select instrument panel special functions Lamp Test. Command the instrument panel lamps OFF. Verify brake lamp turns OFF.
    • If the brake lamp does not turn OFF, replace the IPC.
  2. Disconnect the park brake switch. With a scan tool, observe the Park Brake Switch parameter. Verify parameter is reading ON.
    • If the parameter is OFF, replace the park brake switch.
  3. Test the park brake switch signal circuit for a short to ground. Verify no short is found.
    • If short is found, repair the circuit.
  4. Replace the BCM.
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