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 215 of 1176

TM 9-2320-361-24-1

0013 00

0013 00-3

LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. HEADLIGHT DOES

NOT OPERATE ON

LOW OR HIGH

BEAM, OR BOTH

HEADLIGHTS

INOPERATIVE

(Contd)

Test 2. Test dimmer switch.

1. Ensure body ground straps

are secure and clean.

2. Check dimmer switch input

voltage. Remove lead 16

from dimmer switch.

3. Check lead 16 contact end

for battery voltage. Check

dimmer switch continuity.

1. Remove corrosion and dirt buildup from

ground lead connection.

2. Tighten screws connecting ground strap

to frame.

1. If voltage is present, go to step 3.

2. If voltage is not present, go to test 3.

1. Remove lead 17 from dimmer switch to

pin L. Remove lead 18 from dimmer

switch to pin L.

2. Set multimeter to RX 1 scale. Check

continuity between input pin and pin L.

3. If continuity is not found, push dimmer

switch to change from HIGH to LOW.

Recheck continuity.

4. If no continuity is present, replace

dimmer switch (WP 0111 00).

5. If continuity is present, check continuity

between pin H and input pin.

6. If continuity is present, push dimmer

switch to ON position to change from

LOW to HIGH.

7. If continuity is not present, replace

dimmer switch (WP 0111 00).

18

16

17

MAL 1

TEST 2

STEP 2

MAL 1

TEST 2

STEP 2

MAL 1

TEST 2

STEP 1

INPUT PIN

PIN H

Table 1. Lighting System Troubleshooting Procedures (Contd).

DIMMER

SWITCH

PIN L