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
13.
Using digital multimeter, test for
Voltage Between 18 and 26 Volts -
Lights Do Not Operate
voltage between connector AG-
Replace left backup light (WP 0177).
and/or Backup Alarm
C18 (WP 0009, Figure 345) termi-
Proceed to step 18.
Does Not Operate - Con-
nal 1 and 2. Voltage should be 18
Voltage Less Than 18 Volts -
tinued
to 26 volts.
Replace rear lamps harness (WP
0178).
Proceed to step 18.
14. Disconnect the backup alarm har-
ness connector FC-C2 (WP 0009,
Figure 346) from backup alarm
(WP 0179).
15. Using digital multimeter, test for
Voltage Between 18 and 26 Volts -
voltage between connector FC-
Replace backup alarm (WP 0179).
C2 (WP 0009, Figure 346) termi-
Proceed to step 18.
nal 1 and 2. Voltage should be 18
Voltage Less Than 18 Volts - Pro-
to 26 volts.
ceed to step 16.
16. 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).
17. Using digital multimeter, test for
Voltage Between 18 and 26 Volts -
voltage between connector con-
Replace backup alarm harness (WP
nector FA-C11 (WP 0009, Figure
0179).
362) terminal 1 and 2. Voltage
Proceed to step 17.
should be 18 to 26 volts.
Voltage Less Than 18 Volts -
Replace rear chassis wiring harness
(WP 0188).
Connect the backup alarm harness
connector FC-C2 (WP 0009, Figure
346) to backup alarm (WP 0179).
Proceed to step 17.
18. 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.
0023-118
