If Both Lights Don't Work

TM 10-4110-262-13&P

0018 00

If Both Lights Don't Work

1. Unplug the IC power supply cable from the IC power entry connector.

2. Remove the light switch cover.

3. Remove the light switch from the box and the pull it to the extent of the wires.

4. Reconnect the power at the power entry connector.

5. Test the voltage at the black wire (35001) and the white wire (35000).

6. If line voltage is detected, go to Step 8.

7. If line voltage is not detected, isolate the fault between the power entry connector and the light switch.

8. Disconnect the RU main power supply from the ADR-300.

9. To test the light switch:

a. Disconnect the IC power supply cable from the IC power entry connector to de-energize the IC

electrical system.

b. Remove the switch cover from the light switch, remove the two screws that hold the switch in the

box, and remove the switch from the box.

Test the electrical continuity between the switch terminals.

NOTE

The switch is good if there is no continuity with the switch in the OFF position and

there is continuity with the switch in the ON position.

d. If the switch is good, go to the section entitled, If the Pilot Light Works and the Interior Light Does

Not, Step 3 on the next page.

10. If the switch is not good, replace the switch (see Work Package 0022 00).

If the Interior Light Works and the Pilot Light Does Not

Replace the pilot light (see Work Package 0021 00).

0018 00-2