TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
13. One or Both Brake
Test Step 2. Check for Bad Fuse.
Lights Do Not Operate,
1. Turn ignition switch and battery
Turn Signals Operate
disconnect switch to the OFF
Normally - Continued
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.
Proceed to step 4.
4. Turn control indicator switch to
Right and Left Brake Lights Do Not
position SER. DRIVE, have an
Operate - Repeat troubleshooting
assistant apply the service brakes
from the beginning.
(TM 5-3805-293-10) and observe
Right and Left Brake Lights Oper-
the brake lights from the rear of
ate - Troubleshooting complete.
the machine and verify both brake
lights operate.
Test Step 3. Check for Open Circuit
In 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).
3. Turn battery disconnect switch
and ignition switch to the ON posi-
tion (TM 5-3805-293-10).
4. Use a digital multimeter, test for
Voltage Between 18 and 26 Volts -
voltage between connector P-C11
Proceed to Test Step 4.
(WP 0009, Figure 286) terminals
Voltage Less Than 18 Volts -
1 and machine ground. Voltage
Replace cab lower wiring harness
should be 18 to 26 volts.
(WP 0266).
Proceed to step 5.
5. Turn control indicator switch to
Right and Left Brake Lights Do Not
position SER. DRIVE, Have an
Operate - Repeat troubleshooting
assistant apply the brakes and
from the beginning.
observe the brake lights from the
Right and Left Brake Lights Oper-
rear of the machine and verify
ate - Troubleshooting complete.
both brake lights operate.
0023-69