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3. (B29) BRAKE SWITCH SIGNAL OPEN Turn the ignition off to the lock position. Disconnect the ESM harness connector. Disconnect the Stop Lamp Switch harness connector. Measure the resistance of the (B29) Brake Switch Signal circuit Is the resistance above 5.0 ohms? Yes >> Repair the (B29) Brake Switch Signal for an open. Perform NAG1 TRANSMISSION VERIFICATION TEST. No >> Go To 4 4. (B29) BRAKE SWITCH SIGNAL SHORT TO VOLTAGE Turn the ignition on. Measure the voltage of the (B29) Brake Switch Signal circuit. Is the voltage above 0.5 volts? Yes >> Repair the (B29) Brake Switch Signal for a short to voltage. Perform NAG1 TRANSMISSION VERIFICATION TEST. No >> Using the schematics as a guide, check the Electronic Shift Module (ESM) terminals for corrosion, damage, or terminal Perform NAG1 TRANSMISSION VERIFICATION TEST. 21 - 254 AUTOMATIC TRANSMISSION NAG1 - SHIFTER DIAGNOSTICS LX |