TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
12. Front and Rear Turn Sig- 5.
Using digital multimeter, test for
Voltage Pulsing and Peaks
nals Do Not Operate in
voltage between cab lower wiring
Between 18 and 26 Volts - Replace
Either Right or Left Posi-
harness connector P-C47 (WP
turn signal switch (WP 0283).
tion, Brake Lights Oper-
0009, Figure 330) terminal 2 and
Proceed to step 6.
ate Normally - Continued
machine ground. Voltage should
Voltage Less Than 18 Volts - Pro-
be pulsing 18 to 26 volts.
ceed to Test Step 6.
6. Turn control indicator switch to
Right and Left Turn Signals Do Not
position SER. DRIVE, turn signal
Operate - Repeat troubleshooting
switch (TM 5-3805-293-10) to the
from the beginning.
right turn signal position and verify
Right and Left Turn Signals Oper-
right turn signal operates, then to
ate - Troubleshooting complete.
the left turn signal position and
verify left turn signal operates.
Test Step 6. Check for Shorted Cab
Lower Wiring Harness.
1. Turn battery disconnect switch to
the OFF position.
2. Disconnect the cab lower wiring
harness connector P-C20 (WP
0009, Figure 349) from flasher
module (WP 0266).
3. Disconnect the cab lower wiring
harness connector P-C3 (WP
0009, Figure 34) from cab upper
wiring harness connector R-C1
(WP 0009, Figure 33) (WP 0266).
4. Using digital multimeter, measure
Continuity - Replace cab lower wiring
for continuity between cab lower
harness (WP 0266).
wiring harness connector P-C47
Proceed to step 5.
(WP 0009, Figure 330) terminal 2
No Continuity - Proceed to Test Step
and machine ground. There
7.
should be no continuity.
5. Turn control indicator switch to
Right and Left Turn Signals Do Not
position SER. DRIVE, turn signal
Operate - Repeat troubleshooting
switch (TM 5-3805-293-10) to the
from the beginning.
right turn signal position and verify
Right and Left Turn Signals Oper-
right turn signal operates, then to
ate - Troubleshooting complete.
the left turn signal position and
verify left turn signal operates.
Test Step 7. Check for Open Circuit
In Cab Lower Wiring Harness.
1. Connect jumper wire between cab
lower wiring harness connector P-
C20 (WP 0009, Figure 349) termi-
nals 2 and 6.
0023-67
