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 battery disconnect switch
Operate - Continued
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).
Connect the blackout light harness
connector AAA-C2 (WP 0009, Figure
380) to blackout light (WP 0204).
Proceed to step 5.
5. Turn control indicator switch to
Blackout Lamp Does Not Operate -
position B.O. DRIVE (TM 5-3805-
Repeat troubleshooting from the
293-10) and verify blackout lamp
beginning.
operates.
Blackout Lamp Operates - Trouble-
shooting complete.
Test Step 4. Check for Open Circuit
from Control Indicator Harness.
1. Turn battery disconnect switch to
the OFF position.
N OT E
Ensure that harness connector is tight and secure to control indicator
before performing this step.
2. Verify that control indicator switch
is in position B.O. DRIVE (TM 5-
3805-293-10).
3. Using digital multimeter, measure
Resistance Less Than 10 Ohms -
resistance between control indica-
Proceed to Test Step 6.
tor harness connector PE-C11
Resistance 10 Ohms or Greater -
(WP 0009, Figure 287) terminal 1
Proceed to Test Step 5.
and 5. Resistance should be less
than 5.0 ohms.
Test Step 5. Check for Open Con-
trol Indicator Switch.
1. Disconnect the control indicator
harness connector PE-C10 (WP
0009, Figure 288) from control
indicator switch (WP 0009, Figure
289).
0023-14
