Control Module HVAC: Testing and Inspection

Fig. 29 Delay control test connections.:

1. Remove delay control module and connect 12 volt battery, resistor and switch to module terminals as shown in Fig. 29.
2. Connect positive probe of voltmeter to OUT 1 terminal and connect negative probe to terminal E, then turn on switch. Meter should indicate battery voltage.
3. Turn off switch, then move positive probe of voltmeter to OUT 2 terminal, leaving negative probe connected to E terminal.
4. Meter should indicate 12 volts the moment that switch is closed, and voltage should drop to 1 volt within approximately 0.5 second.
5. If module fails to operate as outlined, replace module and recheck system.