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Page Title:
Table 1. Turn Signal and StopLight Circuits Troubleshooting Procedures. |
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 TM 9-2320-303-24-1
Table 1. Turn Signal and StopLight Circuits Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Neither Stoplight Operates.
1. Check stoplight 20A fuse.
2. Inspect light bulbs.
3. Disconnect leads 420A and
If continuity is indicated, go to
420K from stoplight switch.
step 4. If no continuity is
Check for continuity between
indicated,
replace
stoplight
switch contacts while pressing
switch.
switch.
4. Disconnect leads 420A and
If continuity is indicated, go to
420K from vehicular light
step 5. If no continuity is
switch. Check for continuity
indicated, repair lead 420A or
between leads 420A and 420K
420K.
with stoplight switch closed.
5. Disconnect lead 420C from
If continuity is indicated, go to
vehicular
light
switch.
step 6. If no continuity is
Disconnect lead 36C from turn
indicated, repair lead 420C or lead
signal switch. Check for
36C.
continuity between lead 420C
and 36C.
6. Disconnect lead 36C from
If +12 VDC is present, replace
vehicular light switch. Check
turn signal switch (WP 0070 00).
for +12 VDC in lead 36C with
If no voltage is present, replace
stoplight switch closed.
vehicular light switch (WP 0065
2.
Left Stoplight Not Operating.
1. Inspect light bulb.
2. Remove lamp from left
If continuity is indicated, go to
stoplight (WP 0081 00).Check
step 3. If no continuity is
for continuity between contact
indicated, replace lamp (WP 0081
points.
3. Remove left stoplight lamp. If continuity is indicated, go to
Check for continuity between step 4. If no continuity is
socket and ground.
indicated, repair ground lead.
4. Check for +24 VDC at turn If +24 VDC is present, replace
signal switch at lead 38B turn signal switch (WP 0070 00).
contact point.
If no voltage is present, repair lead
38B.
3.
Right Stoplight Not Operating.
1. Inspect light bulb.
2. Remove lamp from right
If continuity is indicated, go to
stoplight (WP 0081 00). Check
step 3. If no continuity is
for continuity between contact
indicated, replace lamp (WP 0081
points.
3. Remove right stoplight lamp. If continuity is indicated, go to
Check for continuity between step 4. If no continuity is
socket and ground.
indicated, repair ground lead.
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