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
Resistance Less Than 5.0 Ohms -
Do Not Operate in High
resistance between dimmer relay
Replace dimmer relay (WP 0009, Fig-
Beam - Continued
socket (WP 0009, Figure 297) ter-
ure 296).
Connect cab lower wiring harness
should be less than 5.0 ohms.
connector P-C4 (WP 0009, Figure 45)
to dash wiring harness connector PF-
C1 (WP 0009, Figure 44) (WP 0276).
Connect the connector AA-C2 (WP
0009, Figure 291) to right headlight.
Connect the connector AZ-C1 (WP
0009, Figure 387) to left headlight and
install headlight assembly (WP 0197).
Proceed to step 3.
Proceed to Test Step 15.
3. 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 15. Check for Open Front
Worklight Wiring Harness.
1. Disconnect the front work light
wiring harness connector CL-C18
(WP 0009, Figure 294) from cab
lower wiring harness connector P-
C61 (WP 0009, Figure 295) (WP
0183).
Resistance Less Than 5.0 Ohms -
resistance between front work
Replace cab lower wiring harness
light wiring harness connector CL-
(WP 0266).
C18 (WP 0009, Figure 294) termi-
Connect cab lower wiring harness
nal 4 and 8. Resistance should be
connector P-C4 (WP 0009, Figure 45)
less than 5.0 ohms.
to dash wiring harness connector PF-
C1 (WP 0009, Figure 44) (WP 0276).
Remove jumper wire between AA-C2
(WP 0009, Figure 291) terminals 4
and 2.
Install dimmer relay (WP 0009, Figure
296) to dimmer relay socket (WP
0009, Figure 297).
Connect the connector AA-C2 (WP
0009, Figure 291) to right headlight.
0023-28