TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
19. One or Both Backup
Test Step 4. Check for Shorted Rear
Lights Do Not Operate
Chassis Wiring Harness.
and/or Backup Alarm
1. Turn battery disconnect switch
Does Not Operate - Con-
and ignition switch to the OFF
tinued
position (TM 5-3805-293-10).
2. Disconnect the backup alarm har-
ness connector FC-C1 (WP 0009,
Figure 361) from rear chassis wir-
ing harness connector FA-C11
(WP 0009, Figure 362) (WP
0188).
3. Remove backup alarm (WP 0009,
Figure 141) from relay harness
connector FA-C33 (WP 0009, Fig-
ure 142).
4. Using digital multimeter, measure
Continuity - Replace rear chassis
for continuity between rear chas-
wiring harness (WP 0188).
sis wiring harness connector FA-
Install backup alarm (WP 0009, Fig-
C33 (WP 0009, Figure 142) termi-
ure 141) to relay harness connector
nal 4 and machine ground. There
FA-C33 (WP 0009, Figure 142).
should be no continuity.
Proceed to step 5.
No Continuity - Proceed to Test Step
5.
5. Turn battery disconnect switch,
One or Both Backup Lights and/or
and ignition switch to the ON posi-
Backup Alarm Do Not Operate -
tion. Place control indicator switch
Repeat troubleshooting from the
to position SER. DRIVE. Place
beginning.
the transmission control switch in
Both Backup Lights and Backup
R (TM 5-3805-293-10).
Alarm Operate - Troubleshooting
complete.
Test Step 5. Check for Open Rear
Chassis Wiring Harness.
1. Connect jumper wire between FA-
C29 (WP 0009, Figure 310) termi-
nals 2 and 1.
0023-120
