DR-29D Checking A/C Switch Circuit

1. Turn ignition switch Off, then disconnect logic module blue electrical connector.
2. Connect a voltmeter between terminal No. 11 of blue connector and ground, then place ignition switch in Run position.
3. Move blower switch to on position, then push A/C button.
4. If voltmeter reading is within 1 volt of battery voltage, replace logic module.
CAUTION: Before replacing the logic module make sure the terminal in cavity No. 11 is not crushed so that it cannot touch the logic module pin.
5. If voltmeter reading is not within 1 volt of battery voltage, locate and repair open circuit in wire of terminal No. 11 to A/C switch.