TM-9-2320-361-24-1

2-1/2 TON, 6X6, M44A2 SERIES TRUCKS

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2

AUGUST 2006

TM-9-2320-361-24-1 - Page 222 of 1176

TM 9-2320-361-24-1

0013 00

0013 00-10

LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

3. B.O. TAILLIGHT

LAMP DOES NOT

LIGHT

Test 1. Test battery voltage at rear

composite light.

1. Turn main light switch to OFF

position.

2. Disconnect lead 24 at rear

composite light on side of

vehicle where B.O. light has

failed.

3. Turn main light switch to B.O.

MARKER or B.O. DRIVE

positions.

4. Check for battery voltage at

contact end of lead 24.

Test 2. Test continuity of filament in

B.O. taillight lamp.

Check continuity between lead 24

attached to rear composite light and

frame ground.

1. If battery voltage is present, go to

test 2.

2. If battery voltage is not present, go

to WP 0013 00, table 1,

malfunction 1, test 3, and check

front wiring harness, pin E.

1. If continuity is not present, replace

B.O. light lamp (WP 0125 00).

2. If continuity is present, check for

corroded contacts at lamp and on

lead 24 connection to rear wiring

harness. Reconnect lead 24.

Table 2. Blackout Lights (B.O.) Troubleshooting Procedures (Contd).

MAL 3

TEST 2

MAL 3

TEST 1

STEP 4

24

24

B.O. MARKER

B.O. MARKER