Table 2. Blackout Lights (B.O.) Troubleshooting Procedures - continued

TM 9-2320-361-24-1

0013 00

LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd)

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

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 1. Test battery voltage at front

2. B.O. LIGHT

marker light.

MARKER LAMP

DOES NOT LIGHT

1. Turn main light switch to OFF

position.

2. Disconnect lead 20 at rear of

front composite light on side of

vehicle where light is

malfunctioning.

3. Place main light switch lever

in B.O. MARKER or B.O.

DRIVE position.

4. Check for battery voltage at

1. If battery voltage is present, go to

contact end of lead 20.

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.

Test 2. Test continuity of filament in

B.O. marker lamp.

Set multimeter to RX 1 scale. Check

1. If continuity is not present, replace

continuity between frame ground and

B.O. marker lamp (WP 0122 00).

lead 20 attached to rear of B.O.

2. If continuity is still not present,

marker lamp.

check for corroded contacts at lamp

and at lead 20 connection to front

wiring harness. Reconnect lead 20.

B.O. DRIVE

LAMP

PARKING LAMP

MAL 1

TURN

TEST 1

MAL 1

SIGNAL

STEP 4

TEST 2

MAL 2

B.O.

TEST 1

MARKER

STEP 4

MAL 2

TEST 2

0013 00-9