Table 1. Cab Electrical Troubleshooting Procedures - Continued.
TEST OR INSPECTION
7. Front Right Turn Signal
10. Turn control indicator switch to
Front Right Turn Signal Does Not
Does Not Operate - Con-
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
Front Right Turn Signal Operates -
front right turn signal operates.
N OT E
8. Rear Left Turn/Stop
Lamp Does Not Operate
Always inspect the harness connectorsthat are involved in the circuit.
in Both Turn and Stop
Poor connections can often be the cause of a problem in an electrical
circuit. Verify that all connections in the circuit are clean and secure,
and that all connections are in good condition. If a problem with a con-
nection is found, correct the problem and verify that this diagnostic code
is Active before performing this procedure.
Perform open or short circuit test ateach harness connection to identify
correct harness to replace.
Perform this test only if condition is active.
Test Step 1. Check for Faulty Left
1. Disconnect the rear lamps har-
ness connector AG-C4 (WP 0009,
Figure 320) from left tail light (WP
2. Disconnect the rear lamps har-
ness connector AG-C10 (WP
0009, Figure 399) from left tail
light (WP 0177).
3. Turn the turn signal switch (TM 5-
3805-293-10) to the left turn sig-
4. Turn control indicator switch to
position SER. DRIVE (TM 5-
5. Turn battery disconnect switch to
the ON position (TM 5-3805-293-
Voltage Pulsing and Peaks
voltage between connector AG-
Between 18 and 26 Volts - Replace
C4 (WP 0009, Figure 390) termi-
rear left tail lamp (WP 0177).
nal 1 and connector AG-C10 (WP
Proceed to step 7.
0009, Figure 399) terminal 1
Voltage Less Than 18 Volts - Pro-
(Gnd). Voltage should be pulsing
ceed to Test Step 2.
18 to 26 volts.
7. Turn ignition switch and battery
disconnect switch to the OFF
position (TM 5-3805-293-10).