CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
MECHANICAL TRANSMISSION OIL PRESSURE LIGHT--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.
H Reconnect switch panel to gage panel and
miscellaneous switches wiring harness to switch panel.
Disconnect wire 10 from 15 A circuit breaker. Place red
lead of multimeter on wire 10 and black lead to ground.
Turn MASTER switch ON and check for voltage. Turn
MASTER switch OFF. If voltage is present, go to step I.
If voltage is not present, repair/replace wire 10 of switch
panel to gage panel and miscellaneous switches wiring
harness (see paragraph 6-55 for dual voltage; 6-56 for
single voltage).
I Reconnect wire 10 to 15 A circuit breaker. Disconnect
wire 25-27 from 15 A circuit breaker. Place red lead of
multimeter on terminal of circuit breaker and black lead
to ground. Turn MASTER switch on and check for
voltage. Turn MASTER switch OFF. If voltage is not
present, replace 15 A circuit breaker (see paragraph 6-
10). If voltage is present, go to step J.
J Reconnect wire 25-27 to 15 A circuit breaker. Disconnect
main lighting and B.O. selector switch wiring harness.
Place red lead of multimeter on pin K of wire 25-27 and
black lead to ground. Turn MASTER switch on and
check for voltage. Turn MASTER switch OFF. If voltage
is not present, repair/replace wire 25-27 of main lighting
and B.O. selector switch wiring harness (see paragraph
6-69). If voltage is present, go to step K.
2-202
