TM 5-3805-290-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 2. Electrical System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Check for open power circuits.
1. If battery voltage is not present, go to
6.
One or More Worklights
(a) Disconnect wiring harness from
Test 5.
Are Inoperative -
inoperative worklight housing
2. If battery voltage is present, there is an
Continued.
(WP 0060 00).
open worklight housing ground circuit.
(b) Turn battery disconnect switch,
Replace wiring harness in question
engine start switch, and worklight
(WP 0169 00 thru WP 0175 00).
switch to ON position (TM 5-
3805-290-10).
(c) Select service drive mode on main
light switch (TM 5-3805-290-10).
(d) Measure voltage at inoperative
worklight housing between wiring
harness pin 1, circuit 615 (YL) or
608 (GN), and ground.
5. Check for open worklight switch
1. If battery voltage is not present, there
power circuit.
is an open circuit between worklight
(a) Disconnect wiring harness from
relay and worklight switch. Replace
worklight switch (WP 0049 00).
wiring harness in question (WP 0169
(b) Battery disconnect switch and
00 thru WP 0175 00).
engine start switch remain in ON 2. If battery voltage is present, replace
position (TM 5-3805-290-10).
worklight switch (WP 0049 00). If
(c) Select service drive mode on main
problem still exists, there is an open
light switch (TM 5-3805-290-10).
circuit between worklight switch and
(d) If front worklights are inoperative,
worklight. Replace wiring harness in
measure voltage at worklight
question (WP 0169 00 thru WP 0175
switch between wiring harness pin
00).
2, circuit 338 (PK), and ground.
(e) If rear worklights are inoperative,
measure voltage at worklight
switch between wiring harness pin
5, circuit 338 (PK), and ground.
6. Check worklight fuse (TM 5-3805-
1. If fuse is open, replace it.
290-10).
2. If fuse is OK, go to Test 7.
7. Check for open worklight switch
1. If battery voltage is not present,
power circuit.
temporarily replace worklight relay
(a) Disconnect wiring harness from
(WP 0054 00). If problem still exists,
worklight switch (WP 0049 00).
reinstall old relay and go to Test 8.
(b) Turn battery disconnect switch
2. If battery voltage is present, replace
and engine start switch to ON
worklight switch (WP 0049 00).
position (TM 5-3805-290-10).
(c) Select service drive mode on main
light switch (TM 5-3805-290-10).
(d) Measure voltage at switch
between wiring harness pin 2,
circuit 338 (PK), and ground.
0008 00-25
