TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10. Rear Left Turn/Stop
4. Turn battery disconnect switch to
Lamp Does Not Operate
the ON position (TM 5-3805-293-
in Turn Only, Both Stop
10).
Lights Operate Normally
5. Using digital multimeter, test for
Voltage Pulsing and Peaks
- Continued
voltage between cab lower wiring
Between 18 and 26 Volts - Replace
harness connector P-C29 (WP
rear left turn diode (WP 0009, Figure
0009, Figure 323) terminal 1(Yel-
322).
low Wire) and machine ground.
Proceed to step 6.
Voltage should be pulsing 18 to
Voltage Less Than 18 Volts - Pro-
26 volts.
ceed to Test Step 2.
6. Turn control indicator switch to
Rear Left Turn Signal Does Not
position SER. DRIVE, turn signal
Operate - Repeat troubleshooting
switch (TM 5-3805-293-10) to the
from the beginning.
left turn signal position and verify
Rear Left Turn Signal Operates -
rear left turn signal operates.
Troubleshooting complete.
Test Step 2. Check for Faulty Turn
Signal Switch.
1. Turn battery disconnect switch to
the OFF position.
2. Disconnect the cab lower wiring
harness connector P-C47 (WP
0009, Figure 330) from turn signal
switch (WP 0009, Figure 331)
(WP 0283).
3. Using digital multimeter, measure
Resistance Less Than 5.0 Ohms -
for resistance between turn sig-
Replace cab lower wiring harness
nal switch (WP 0009, Figure 331)
(WP 0266).
terminal 1 and terminal 2. Resis-
Proceed to step 4.
tance should be less than
Resistance 5.0 Ohms or Greater -
5.0 ohms.
Replace turn signal switch (WP 0283).
Connect the rear left turn diode (WP
0009, Figure 322) to cab lower wiring
harness connector P-C29 (WP 0009,
Figure 323) (WP 0266).
Proceed to step 4.
4. Turn control indicator switch to
Rear Left Turn Signal Does Not
position SER. DRIVE, turn signal
Operate - Repeat troubleshooting
switch (TM 5-3805-293-10) to the
from the beginning.
left turn signal position and verify
Rear Left Turn Signal Operates -
rear left turn signal operates.
Troubleshooting complete.
0023-61
