CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
HYDRAULIC RESERVOIR MONITORING SYSTEM SWITCHES AND LIGHTS-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.
A
Disconnect flasher system panel wiring harness from
hydraulic oil high temperature light. Place red lead of
multimeter in socket B of wire 627A and black lead to
ground. Turn MASTER switch on, place power control
lever switch in ON position, and check for voltage. Turn
MASTER switch and power control lever switch OFF. If
voltage is present, go to step C. If voltage is not
present, go to step B.
B
Reconnect flasher system panel wiring harness to
hydraulic oil high temperature light. Disconnect wire
627A of flasher system panel wiring harness from Y-
connector at power control lever switch. Place red lead
of multimeter on Y-connector terminal and black lead to
ground. Turn MASTER switch on, place power control
lever switch in ON position, and check for voltage. Turn
MASTER switch and power control lever switch OFF. If
voltage is present, repair/replace wire 627A of flasher
system panel wiring harness from Y-connector to
hydraulic high temperature lamp (see paragraph 6-48).
If voltage is not present, troubleshoot power control
lever switch circuit.
C
Place a jumper wire from socket B to pin B. Place red
lead of multimeter on terminal of hydraulic oil high
temperature light and black lead to ground. Turn
MASTER switch on, place power control lever switch in
ON position, and check for voltage. Turn MASTER
switch and power control lever switch OFF. If voltage is
present, go to step D. If voltage is not present, replace
hydraulic oil high temperature lamp (see paragraph 6-
11).
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