Table 1. Headlight Circuits Troubleshooting Procedures.

TM 9-2320-303-24-1

Table 1. Headlight Circuits Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Right Headlight Fails To Operate When 1. Inspect headlight bulb.

Switch Is Turned On.

2. Check right headlight 15A

fuse.

3. Disconnect lead 14 from right If +12 VDC is present, go to step

headlight 15A fuse. Check for 4. If no voltage is present, repair

+12VDC at lead 14.

lead 14.

4. Disconnect ground lead from If +12 VDC is present, repair

right headlight. Check for +12 ground lead. If no voltage is

VDC at ground lead to right present, go to step 5.

headlight.

5. Disconnect right headlight If continuity is indicated, go to

power relay from connector. step 6. If no continuity is

Check for continuity between indicated, repair ground lead.

connector 86 and ground.

6. Disconnect right headlight If +12 VDC is present, go to step

power relay from connector. 7. If no voltage is present, repair

Check for +12 VDC at lead 20A.

connector 30.

7. Disconnect left headlight

If continuity is present, go to step

power relay from connector.

8. If no continuity is indicated,

Check for continuity between

repair lead 420M between left

connector 85 from right

headlight power relay and right

headlight power relay and

headlight power relay.

connector 85 from left

headlight power relay.

8. Disconnect right low/high If +12 VDC is present, go to step

beam relay from connector. 9. If no voltage is present, repair

Check for +12 VDC at lead 20R.

connector 30.

9. Disconnect left low/high beam

If continuity is present, replace

relay from connector. Check

right low/high beam relay (WP

for

continuity

between

0072 00). If no continuity is

connector 86 from right low/

indicated, repair lead 222 between

high beam relay and connector

left low/high beam relay and right

86 from left low/high beam

low/high beam relay.

relay.

Neither Headlight Low/high Beam Operates 1. Disconnect ground lead from If continuity is present, go to step

When Turn Signal Switch Lever Is Set.

dimmer switch lever. Check for 2. If no continuity is indicated,

continuity between lead and repair ground lead.

ground.

2. Disconnect lead 222 from

If continuity is present, go to step

dimmer switch lever. Check for

3. If no continuity is indicated,

continuity between terminals

replace dimmer switch lever (WP

of switch in both positions.

0070 00).

0010 00-9