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*BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON THE SCAN TOOL (CONTINUED) 3. (Z429) BRAKE LAMP SWITCH GROUND CIRCUIT OPEN Using a 12-volt test light connect to 12-volts, probe the (Z429) Brake Does the test light illuminate brightly? Yes >> Go To 4 No >> Repair the open in the (Z429) Brake Lamp Switch Ground circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 4. BRAKE LAMP SWITCH Measure the resistance across the (B29) Brake Lamp Switch Signal terminal and the (Z429) Ground terminal (mea- Apply and release the Brake Pedal while monitoring the ohmmeter. Does the resistance change from below 5.0 ohms to open circuit? Yes >> Go To 5 No >> Replace the Brake Lamp Switch. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 5. (B29) BRAKE LAMP SWITCH SIGNAL CIRCUIT OPEN Disconnect the C3 PCM harness connector. Measure the resistance of the (B29) Brake Lamp Switch Signal circuit Is the resistance below 5.0 ohms? Yes >> Go To 6 No >> Repair the open in the (B29) Brake Lamp Switch Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer 9 - 2014 ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10 DR/DH |