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
2.
Connect jumper wire between FA-
Lights Do Not Operate
C33 (WP 0009, Figure 142) termi-
and/or Backup Alarm
nal 1 and machine ground.
Does Not Operate - Con-
3.
Using digital multimeter, measure
Resistance Less Than 5.0 Ohms -
tinued
resistance between connector FA-
Replace cab lower wiring harness
C22 (WP 0009, Figure 47) termi-
(WP 0266).
nal 2 and machine ground. Resis-
Connect the control indicator harness
tance should be less than
connector PE-C10 (WP 0009, Figure
5.0 ohms.
288) to control indicator switch (WP
0009, Figure 289).
Connect the control indicator harness
connector PE-C11 (WP 0009, Figure
287) to cab lower wiring harness con-
nector P-C11 (WP 0009, Figure 286)
(WP 0283).
Connect the backup alarm relay (WP
0009, Figure 141) to rear chassis wir-
ing harness connector FA-C33 (WP
0009, Figure 142) (WP 0188).
Connect the rear lamps harness con-
nector AG-C20 (WP 0009, Figure 311)
to rear chassis wiring harness con-
nector FA-C29 (WP 0009, Figure 310)
(WP 0178).
Proceed to step 4.
Resistance 5.0 Ohms or Greater -
Replace rear chassis wiring harness
(WP 0188).
Connect the control indicator harness
connector PE-C10 (WP 0009, Figure
288) to control indicator switch (WP
0009, Figure 289).
Connect the control indicator harness
connector PE-C11 (WP 0009, Figure
287) to cab lower wiring harness con-
nector P-C11 (WP 0009, Figure 286)
(WP 0283).
Proceed to step 4.
4. 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.
0023-127
