TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. One or Both Headlights
Test Step 9. Check for Open Circuit
Do Not Operate in High
Breaker Box Wiring.
Beam - Continued
1. Remove jumper wire between
head lamp relay socket (WP
0009, Figure 299) terminals C14
and E13.
2. Disconnect the rear chassis wir-
ing harness connector FA-C41
(WP 0009, Figure 21) from circuit
breaker box wiring connector R-
C5 (WP 0009, Figure 22) (WP
0239).
3. Turn battery disconnect switch to
the ON position.
4. Use a digital multimeter, test for
Voltage Between 18 and 26 Volts -
voltage between circuit breaker
Proceed to Test Step 10.
box wiring connector R-C5 (WP
Voltage Less Than 18 Volts -
0009, Figure 22) terminal 11 and
Replace RH position circuit breaker
machine ground. Voltage should
(WP 0240).
be 18 to 26 volts.
Install headlamp relay (WP 0009, Fig-
ure 289) to headlamp relay socket
(WP 0009, Figure 299).
Connect the control indicator harness
connector PE-C11 (WP 0009, Figure
287) to cab lower wiring harness con-
nector P-C11 (WP 0009, Figure 286)
(WP 0283).
Connect the connector AZ-C1 (WP
0009, Figure 387) to left headlight and
install headlight assembly (WP 0197).
Proceed to step 5.
5. Turn control indicator switch to
Headlight or Headlights Do Not
position SER. DRIVE, dimmer
Operate in High Beam - Repeat trou-
switch to high beam (TM 5-3805-
bleshooting from the beginning.
293-10) and verify headlights
Both Headlights Operate in High
operate in high beam.
Beam - Troubleshooting complete.
Test Step 10. Check for Open Rear
Chassis Wiring Harness and Cab
Lower Wiring Harness.
1. Turn battery disconnect switch to
the OFF position.
2. Connect jumper wire between
head lamp relay socket (WP
0009, Figure 299) terminals E14
and E13.
0023-24
