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
5. Turn control indicator switch to
Headlight or Headlights Do Not
Do Not Operate in High
position SER. DRIVE, dimmer
Operate in High Beam - Repeat trou-
Beam - Continued
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 6. Check for Open Circuit
from Control Indicator Harness.
1. Turn ignition switch and battery
disconnect switch to the OFF
position (TM 5-3805-293-10).
2. Verify that control indicator switch
is in position SER. DRIVE.
3. Using digital multimeter, measure
Resistance Less Than 5.0 Ohms -
resistance between control indica-
Proceed to Test Step 8.
tor harness connector PE-C11
Resistance 5.0 Ohms or Greater -
(WP 0009, Figure 287) terminal 1
Proceed to Test Step 7.
and 6. Resistance should be less
than 5.0 ohms.
Test Step 7. 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).
2. Using digital multimeter, measure
Resistance Less Than 5.0 Ohms -
resistance between control indica-
Replace control indicator harness
tor switch (WP 0009, Figure 289)
(WP 0283).
terminal F and M. Resistance
Connect the connector AZ-C1 (WP
should be less than 5.0 ohms.
0009, Figure 387) to left headlight and
install headlight assembly (WP 0197).
Proceed to step 3.
Resistance 5.0 Ohms or Greater -
Replace control indicator switch (WP
0283).
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 3.
0023-22