DR-29B Checking Brake Switch Circuit

1. Turn ignition switch Off, then disconnect blue connector from logic module.
2. Connect a voltmeter between terminal No. 13 and ground.
3. Turn ignition switch to Run position, then depress brake pedal.
4. If voltmeter reads within 1 volt of battery voltage, replace logic module.
CAUTION: Before replacing the logic module make sure terminal in cavity No. 13 is not crushed so that it cannot touch the logic module pin.
5. If voltmeter reading is not within 1 volt of battery voltage, check for open circuit in wire of terminal No. 13 to brake switch, defective brake switch or open circuit to brake switch.