Table 1. Cab Electrical Troubleshooting Procedures - Continued.
TEST OR INSPECTION
17. One or Both Blackout
3. Turn battery disconnect switch to
One or Both Blackout Brake Lights
Brake Lights Do Not
the ON position and control indi-
Do Not Operate - Repeat trouble-
Operate - Continued
cator switch to position B.O.
shooting from the beginning.
DRIVE (TM 5-3805-293-10).
Both Blackout Brake Lights Oper-
Have an assistant apply the ser-
ate - Troubleshooting complete.
vice brakes and observe the
blackout brake lights from the rear
of the machine.
N OT E
18. One or Both Blackout
Tail Lights Do Not Oper-
Always inspect the harness connectorsthat are involved in the circuit.
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
connection 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 Black-
out Tail Light.
1. Turn ignition switch and battery
disconnect switch to the ON posi-
tion (TM 5-3805-293-10).
2. Turn control indicator switch to
position B.O. DRIVE (TM 5-3805-
3. Visually check if left blackout tail
Right Blackout Tail Light Only Does
light or right blackout tail light or
Not Operate - Proceed to step 4.
both do not operate.
Left Blackout Tail Light Only Does Not
Operate - Proceed to step 7.
Both Blackout Tail Lights Do Not
Operate - Proceed to step 10.
4. Disconnect the connector AG-
C15 (WP 0009, Figure 341) from
right tail light (WP 0177).
5. Disconnect the connector AG-
C16 (WP 0009, Figure 400) from
left tail light (WP 0177).