TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. Blackout Lamp Does not
3. Turn control indicator switch to
Operate - Continued
position B.O. DRIVE (TM 5-3805-
293-10).
4. Using digital multimeter, test for
Voltage Between 18 and 26 Volts -
voltage between blackout light
Replace blackout lamp (WP 0203).
harness connector AAA-C2 (WP
Proceed to step 5.
0009, Figure 380) terminal 1 and
Voltage Less Than 18 Volts - Pro-
machine ground. Voltage should
ceed to Test Step 2.
be 18 to 26 volts.
5. Turn control indicator switch to
Blackout Lamp Does Not Operate -
position B.O. DRIVE and verify
Repeat troubleshooting from the
blackout lamp operates.
beginning.
Blackout Lamp Operates - Trouble-
shooting complete.
Test Step 2. Check for Bad Fuse.
1. Turn ignition switch and battery
disconnect switch to the OFF
position (TM 5-3805-293-10).
2. Remove fuse F38 from cab fuse
panel (TM 5-3805-293-10).
3. 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 blackout light harness
connector AAA-C2 (WP 0009, Figure
380) to blackout light (WP 0204).
Proceed to step 4.
Blackout Lamp Does Not Operate -
4. Turn control indicator switch to
Repeat troubleshooting from the
position B.O. DRIVE (TM 5-3805-
beginning.
293-10) and verify blackout lamp
operates.
Blackout Lamp Operates - Trouble-
shooting complete.
Test Step 3. Check for Open Cab
Lower Wiring Harness.
1. Install fuse F38 on cab fuse panel
(TM 5-3805-293-10).
2. Disconnect the control indicator
harness connector PE-C11 (WP
0009, Figure 287) from cab lower
wiring harness connector P-C11
(WP 0009, Figure 286) (WP
0283).
0023-13
