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Page Title:
Table 1. Marker and Taillight Circuits Troubleshooting Procedures. |
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 TM 9-2320-303-24-1
Table 1. Marker and Taillight Circuits Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
None Of The Marker Lights And Taillights 1. Check tractor tail marker 15A
Operate.
fuse.
2. Disconnect connector
on Install jumper wire between
vehicular light switch.
connector 420F and pin F on
switch. Check for +12 VDC at pin
H.
If +12 VDC is present, repair lead
420H. If no voltage is present at
vehicular light switch, replace
vehicular light switch (WP 0065
2.
Left Front Marker Light Not Operating.
1. Inspect light bulb.
2. Remove lamp from socket (WP If continuity is indicated, go to
between contacts of lamp.
indicated, replace lamp (WP 0083
3. Check for continuity between If continuity is indicated, go to
socket and ground.
step 4. If no continuity is
indicated, repair ground lead.
4. Disconnect lead 46E from lead If +12 VDC is present, repair lead
46. Check for +12 VDC at lead 46E. If no voltage is present,
46.
repair lead 46.
3.
Right Front Marker Light Not Operating.
1. Inspect light bulb.
2. Remove lamp from socket (WP If continuity is indicated, go to
between contacts of lamp.
indicated, replace lamp (WP 0083
3. Check for continuity between If continuity is indicated, go to
socket and ground.
step 4. If no continuity is
indicated, repair ground lead.
4. Disconnect lead 46F from lead If +12 VDC is present, repair lead
46. Check for +12 VDC at lead 46E. If no voltage is present,
46.
repair lead 46.
4.
One Or More Cab Marker Lights Not 1. Inspect light bulbs.
Operating.
2. Remove
lamp(s)
from
If continuity is indicated, go to
defective circuit(s) (WP 0083
step 3. If no continuity is
indicated, replace lamp(s) (WP
between socket and ground.
3. Disconnect ground lead from If continuity is indicated, repair
marker light(s). Check for lead(s) 46. If no continuity is
continuity between ground indicated, repair ground lead(s).
lead(s) and ground.
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