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
11. Check for an open worklight relay
1. If battery voltage is present, there is an
6.
One or More Worklights
power circuit.
open circuit between worklight switch
Are Inoperative -
(a) Worklight relay remains removed.
and worklight relay. Replace wiring
Continued.
(b) Battery disconnect switch remains
harness in question (WP 0169 00 thru
in ON position (TM 5-3805-290-
WP 0175 00).
10).
2. If battery voltage is not present, there
(c) Engine start switch remains in
is an open circuit between worklight
OFF position (TM 5-3805-290-
fuse and worklight relay. Replace
10).
wiring harness in question (WP 0169
(d) Measure voltage at worklight relay
00 thru WP 0175 00).
between wiring harness pin 1,
circuit 127 (OR), and ground.
1. Determine condition.
1. If one service light is inoperative,
7.
One or Both Service Lights
replace service light bulb (WP 0062
Are Inoperative.
00). If problem still exists, go to Test 2.
2. If both service lights are inoperative,
go to Test 4.
2. Check for open power circuit.
1. If battery voltage is present, go to Test
(a) Disconnect wiring harness from
3.
service light housing (WP 0062
2. If battery voltage is not present, there
00).
is an open circuit between service light
(b) Turn battery disconnect switch
relay and service light housing.
and engine start switch to ON
Replace wiring harness in question
position (TM 5-3805-290-10).
(WP 0169 00 thru WP 0175 00).
(c) Select service drive mode on main
light switch (TM 5-3805-290-10).
(d) Measure voltage at service light
between wiring harness pin 6,
circuit 619 (GN), and ground.
3. Check for open ground circuit.
1. If continuity is present, replace or
(a) Battery disconnect switch remains
repair service light housing and wiring.
in ON position (TM 5-3805-290- 2. If continuity is not present, there is an
10).
open service light ground circuit.
(b) Wiring harness remains
Replace wiring harness in question
disconnected from service light
(WP 0169 00 thru WP 0175 00).
housing.
(c) Turn engine start switch to OFF
position (TM 5-3805-290-10).
(d) Check continuity at service light
between wiring harness pin 2,
circuit 200 (BK), and ground.
4. Check service light breaker (TM 5-
If breaker is open, replace it. If problem
3805-290-10).
still exists or breaker is OK, go to Test 5.
