CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
SERVICE STOPLIGHT-Continued
WARNING
Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry contacts a metal
surface a direct short may result in instant
heating of tools, damage to equipment, and
injury or death to personnel.
J
Reconnect
wire
75/16
to
stoplight
switch.
Disconnect wire 75 from stoplight switch. Place
red lead of multimeter on wire 75 of stoplight
switch and black lead to ground. Turn MASTER
switch on, UNLOCK and place main lighting
switch in SER. DRIVE position, depress stoplight
switch, and check for voltage. Turn MASTER,
main lighting, and stoplight switches OFF. If
voltage is present, repair/replace wire 75 of switch
panel to gage panel and miscellaneous switches
wiring harness (see paragraph 6-55 for dual
voltage; 6-56 for single voltage). If voltage is not
present, replace stoplight switch (see paragraph 6-
23).
K Reconnect switch panel to gage panel and
miscellaneous switches wiring harness to main
switch panel. Install main switch panel (11), flat
washer (10), ground lead (9), three lockwashers
(8), and three screws (7). Open air inlet doors.
Disconnect wire 48 pin A from bulkhead to master
relay wiring harness. Place red multimeter lead in
socket and black lead to ground. Turn MASTER
switch on and check for voltage. If voltage is
present, repair/replace switch panel, radio, and
bilge pump to bulkhead wiring harness (see
paragraph 6-53). If voltage is not present,
troubleshoot master relay circuit (see paragraph 2-
19, master relay fails to operate).
2-288