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
6. Using digital multimeter, test for
Voltage Between 18 and 26 Volts
Illumination Lights Do
voltage between cab upper wiring
On Harness Connector R-C50 Only
not Operate - Continued
harness connector R-C51 (WP
- Replace RH joystick illumination light
0009, Figure 285) terminal 1 and
(WP 0277).
2. Voltage should be 18 to 26
Proceed to step 7.
volts.
Voltage Between 18 and 26 Volts
On Harness Connector R-C51 Only
- Replace LH joystick illumination light
(WP 0277).
Proceed to step 7.
Voltage Between 18 and 26 Volts
On Both Harness Connector R-C50
And Harness Connector R-C51 -
Replace RH joystick illumination light
and LH joystick illumination light (WP
0277).
Voltage Less Than 18 Volts -
Replace cab upper wiring harness
(WP 0265).
Proceed to step 7.
7. 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.
Test Step 2. Check for Bad Fuse.
1. Remove fuse F38 from cab fuse
panel (TM 5-3805-293-10).
2. Visually inspect fuse F38 for open
Resistance Less Than 5.0 Ohms -
or use a digital multimeter to mea-
Proceed to Test Step 3.
sure resistance between the ter-
Fuse Open or Resistance 5.0 Ohms
minals of fuse F38. Resistance
or Greater - Replace fuse F38.
should be less than 5.0 ohms.
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.
0023-6
