Table 1. Utility Light Circuits Troubleshooting Procedures.

TM 9-2320-303-24-1

Table 1. Utility Light Circuits Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Neither Utility Light Operates.

1. Inspect light bulbs.

Replace if broken or defective

(WP 0085 00).

2. Disconnect leads 420JD and 73

If continuity is indicated, go to

from 15A fuse. Check for

step 3. If no continuity is

continuity between contacts of

indicated, replace 15A fuse (WP

15A fuse.

0072 00).

3. Check for +12 VDC at lead If +12 VDC is present, go to step

420JD from auxiliary light 4. If no voltage is present, repair

power bus.

lead 420JD.

4. Disconnect lead 73 from utility If +12 VDC is present, go to step

light switch. Check for +12 5. If no voltage is present, repair

VDC at lead 73.

lead 73.

5. Disconnect lead 73B from

If continuity is indicated, repair

utility light switch. Activate

lead 73B. If no continuity is

switch. Check for continuity

indicated, replace utility light

between switch contacts.

switch (WP 0066 00).

Only One Utility Light Operating.

1. Disconnect lead 73B from If +12 VDC is present, go to step

defective utility light. Check 2. If no voltage is present, repair

for +12 VDC at lead 73B.

lead 73B.

2. Check for continuity between If continuity is indicated, replace

socket and ground.

utility light (WP 0085 00). If no

continuity is indicated, repair

ground lead.

Utility Light Indicator Light Not Operating, Disconnect lead 73A from pin If +12 VDC is present,

Utility Lights Operating Normally.

D16 of warning light bar. Check troubleshoot warning light circuit.

for +12 VDC at lead 73A.

If no voltage is present, repair lead

73A.

0010 00-26