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
8. Check for open worklight blackout
1. If battery voltage is not present, there
6.
One or More Worklights
relay power circuits.
is an open circuit between worklight
Are Inoperative -
(a) Battery disconnect and engine
blackout relay and fuse. Replace wiring
Continued.
start switches remain in ON
harness in question (WP 0195 00 thru
position (TM 5-3805-291-10).
WP 0201 00).
(b) Select service drive mode on main 2. If battery voltage is present, go to Test
light switch (TM 5-3805-291-10).
9.
(c) If front worklights are inoperative,
measure voltage at worklight
blackout relay holder between
wiring harness pin 30, wire 129
(BU), and ground.
(d) If rear worklights are inoperative,
measure voltage at worklight
blackout relay holder between
wiring harness pin (30), wire 128
(PK), and ground.
9. Perform relay test on worklight
1. Replace relay as necessary (WP 0053
blackout relay (WP 0022 00).
00).
2. If relay is OK, go to Test 10.
10. Check for open worklight relay coil
1. If battery voltage is present and not all
power circuit.
worklights are inoperative, there is an
(a) Battery disconnect and engine
open circuit in worklight blackout relay
start switches remain in ON
ground 200 (BK). Replace wiring
position (TM 5-3805-291-10).
harness in question (WP 0195 00 thru
(b) Select service drive mode on main
WP 0201 00).
light switch (TM 5-3805-291-10). 2. If battery voltage is present and all
(c) Measure voltage at worklight
worklights are inoperative, replace
blackout relay holder between
worklight switch (WP 0055 00).
wiring harness pin 85, wire A652 3. If battery voltage is not present and not
(BU), and ground.
all worklights are inoperative, there is
an open circuit between worklight
blackout relay and main light switch.
Replace wiring harness in question
(WP 0195 00 thru WP 0201 00).
4. If battery voltage is not present and all
worklights are inoperative, go to Test
11.
0008 00-39
