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 223 of 1176

TM 9-2320-361-24-1

0013 00

0013 00-11

LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

4. B.O. STOPLIGHT

LAMP DOES NOT

LIGHT

Test 1. Test for battery voltage at rear

composite light.

1. Turn main light switch to OFF

position.

2. Disconnect lead 23 at rear

composite light on side of

vehicle where B.O. stoplight is

malfunctioning.

3. Turn main light switch to B.O.

MARKER or B.O. DRIVE

positions.

4. Depress brake pedal and check

for battery voltage on contact

end of lead 23.

Test 2. Test continuity of filament in

B.O. stoplight lamp.

Check for continuity between lead 23

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 N.

1. If continuity is not present, replace

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

2. If continuity is present, check for

corroded contacts at lamp and on

lead 23 connection to rear wiring

harness. Reconnect lead 23.

B.O. MARKER

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

MAL 3

TEST 2

MAL 3

TEST 1

STEP 4