Table 3. Directional Signal Systems Troubleshooting Procedures - continued

TM 9-2320-361-24-1

0013 00

LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd)

Table 3. Directional Signal Systems Troubleshooting Procedures (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 1. Check stoplight switch for

2. ALL STOPLIGHTS

input voltage.

ARE INOPERATIVE

1. Turn main light switch to

SERVICE DRIVE position.

2. Set multimeter to voltage

range that will measure

24 VDC.

3. Disconnect lead 75 input

voltage from stoplight switch.

4. Touch positive lead of

multimeter to contact end of

lead 75.

5. Touch negative lead of

1. If voltage is present, go to test 2.

multimeter to frame ground.

2. If voltage is not present, go to

WP 0013 00, table 1, malfunction 1,

test 3. Depress brake pedal and

check lead 75.

Test 2. Check stoplight switch for

output voltage.

1. Set multimeter to voltage

range that will measure

24 VDC.

2. Disconnect output lead 75 from

stoplight switch.

3. Touch positive lead of

multimeter to contact end of

stoplight switch.

4. Touch negative lead of

multimeter to frame ground.

If voltage is not present, and

5. Depress brake pedal.

stoplights are still inoperative, go to

step 6.

6. Place main light switch in OFF

position.

7. Set multimeter to RX 1 scale.

8. Place positive lead of

multimeter in pin A of wiring

harness.

1. If continuity is present, replace

9. Place negative lead on input

stoplight switch (WP 0112 00).

lead 75 at stoplight switch.

2. If continuity is not present, repair or

replace wire or wiring harness.

NOTE

If vehicle is equipped with hydraulic

stoplight switch and switch is

defective, replace air-activated

stoplight switch conversion kit, part

number 12255668.

0013 00-18