TM 5-3805-291-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 2. Electrical System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. Check for open worklight switch
1. If battery voltage is not present, go to
6.
One or More Worklights
power circuits.
Test 7.
Are Inoperative -
(a) Wiring harness remains
2. If battery voltage is present, replace
Continued.
disconnected from worklight
worklight switch (WP 0055 00).
switch.
(b) Battery disconnect and engine
start switches remain in ON
position (TM 5-3805-291-10).
(c) Select service drive mode on main
light switch (TM 5-3805-291-10).
(d) If front worklights are inoperative,
measure voltage at worklight
switch between wiring harness pin
2, wire 646 (OR), and ground.
(e) If rear worklights are inoperative,
measure voltage at worklight
switch between wiring harness pin
5, wire 647 (GN), and ground.
7. Check continuity of worklight switch 1. If continuity is not present, there is an
power circuits.
open circuit between worklight
(a) Wiring harness remains
blackout relay and worklight switch.
disconnected from worklight
Replace wiring harness in question
switch.
(WP 0195 00 thru WP 0201 00).
(b) Battery disconnect and engine
2. If continuity is present, go to Test 8.
start switches remain in ON
position (TM 5-3805-291-10).
(c) Remove worklight blackout relay
(WP 0053 00).
(d) If front worklights are inoperative,
check continuity between
worklight switch wiring harness
pin 2, wire 646 (OR), and
worklight blackout relay holder
pin 87, wire 646 (OR).
(e) If rear worklights are inoperative,
measure voltage at worklight
switch between wiring harness pin
5, wire 647 (GN), and worklight
blackout relay holder pin 87, wire
647 (GN).
0008 00-38
