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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.

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