TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. One or Both Headlights
2. Using digital multimeter, measure
Resistance Less Than 5.0 Ohms -
Do Not Operate in Low
for resistance between control
Replace cab upper wiring harness
Beam - Continued
switch panel wiring harness con-
(WP 0265).
nector A-C1 (WP 0009, Figure 31)
Install dimmer relay (WP 0009, Figure
terminal 23 and terminal 22.
296) to dimmer relay socket (WP
Resistance should be less than
0009, Figure 297).
5.0 ohms.
Connect the connector AZ-C1 (WP
0009, Figure 387) to left headlight and
install headlight assembly (WP 0197).
Connect the front work light wiring
harness connector CL-C18 (WP 0009,
Figure 294) to cab lower wiring har-
ness connector P-C61 (WP 0009, Fig-
ure 295) (WP 0183).
Proceed to step 3.
Resistance 5.0 Ohms or Greater -
Proceed to Test Step 15.
3. Turn control indicator switch to
Headlight or Headlights Do Not
position SER. DRIVE, dimmer
Operate in Low Beam - Repeat trou-
switch to low beam (TM 5-3805-
bleshooting from the beginning.
293-10) and verify headlights
Both Headlights Operate in Low
operate in low beam.
Beam - Troubleshooting complete.
Test Step 15. Check for Open Cir-
cuit In Dimmer Switch.
1. Disconnect the control switch
panel wiring harness connector A-
C7 (WP 0009, Figure 301) from
dimmer switch (WP 0009, Figure
300) (WP 0275).
0023-46
