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
2. Using digital multimeter, measure
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).
minal C11 and E11. Resistance
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.
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 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).
2. Using digital multimeter, measure
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