TM 5-3805-248-23-1
LIGHTING SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0012 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
Cutting-Edge Worklight,
Low Beams and High
Beams Are All Inoperative.
WARNING
Remove all jewelry, watch, rings, etc. prior to disconnecting cables from batter-
ies or other electrical source. Items can come in contact with battery or electrical
source and cause electrical shock. Failure to follow this warning may cause
injury or death.
Make sure wheels are chocked and bowl is lowered to ground for all tests. Fail-
ure to do so may cause injury or death.
Eye protection must be worn when performing maintenance where components
or particles could fly out during procedure. Failure to take precautions may
cause injury.
NOTE
For detailed electrical diagram, refer to WP 0005 00.
1.
Check if back-up alarm is inoperative
1. If back-up alarm, cutting-edge
also.
worklight, low beams and high beams
are all inoperative, repair ground circuit
for relays located under operator
compartment (WP 0018 00).
2. If cutting-edge worklight, low beams
and high beams are all inoperative, but
back-up alarm operates correctly, go to
Test 2.
2.
Check for continuity between relay
and light switch.
a. Place battery disconnect switch in
OFF position (TM 5-3805-248-10).
b. Set multimeter to appropriate ohm
(Ω) range (WP 0018 00).
c. Disconnect blue wire from either
high beam or low beam relay (WP
d. Disconnect light switch electrical
connections (WP 0067 00).
