TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. One or Both Joystick
2. Using digital multimeter, measure
Continuity - Replace cab upper wir-
Illumination Lights Do
for continuity between cab upper
ing harness (WP 0265).
not Operate - Continued
wiring harness connector R-C1
Connect the control indicator harness
(WP 0009, Figure 33) terminal 31
connector PE-C11 (WP 0009, Figure
and 15. There should be no conti-
287) to cab lower wiring harness con-
nuity.
nector P-C11 (WP 0009, Figure 286)
(WP 0283).
Proceed to step 3.
No Continuity - Replace cab lower
wiring harness (WP 0266).
Connect the cab upper wiring harness
connector R-C50 (WP 0009, Figure
284) to RH joystick illumination light.
Connect the cab upper wiring harness
connector R-C51 (WP 0009, Figure
285) to LH joystick illumination light.
Proceed to step 3.
3. Turn control indicator switch to
RH and/or LH Joystick Illumination
position SER. DRIVE (TM 5-
Lights Do Not Operate - Repeat
3805-293-10) and verify RH and
troubleshooting from the beginning.
LH joystick illumination lights
RH and LH Joystick Illumination
operate.
Lights Operate - Troubleshooting
complete.
N OT E
3. Blackout Lamp Does not
Operate
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 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 Bad Black-
out LED.
1. Disconnect the blackout light har-
ness connector AAA-C2 (WP
0009, Figure 380) from blackout
light (WP 0204).
2. Turn battery disconnect switch to
the ON position (TM 5-3805-293-
10).
0023-12