CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
ENGINE GENERATOR (SINGLE VOLTAGE SYSTEM)-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.
D
Reconnect APU and engine generator relays to
voltage regulator wiring harness to engine regulator.
Disconnect wire 2 of APU and engine generator relays
to voltage regulator wiring harness from engine
generator relay. Place red lead of multimeter on
terminal of engine generator relay and black lead to
ground. Turn MASTER switch on, start engine, open
generator cutout switch and check for voltage. Turn
engine and MASTER switch OFF, and close generator
cutout switch. If voltage is present, go to step F. If
voltage is not present, go to step E.
E
Reconnect wire 2 of APU and engine generator relays
to voltage regulator wiring harness to engine
generator relay. Disconnect wire 62/2 of APU and
engine generator relays to voltage regulator wiring
harness from APU generator relay. Place red lead of
multimeter on wire 62/2 and black lead to ground.
Turn MASTER and APU generator switches on, and
check for voltage. Turn APU generator and MASTER
switches OFF. If voltage is not present, repair/replace
wire 62/2 of APU and engine generator relays to
voltage regulator wiring harness. If voltage is present,
replace master relay (see paragraph 6-2).
F
Reconnect wire 2 of engine disconnect to engine
generator relay lead to engine generator relay.
Remove
engine
deck
(see
paragraph
9-51).
Disconnect generator power lead assembly from
engine disconnect. Place red lead of multimeter in
socket A of wire 2 and black lead to ground. Turn
MASTER switch on, start engine, open generator
cutout switch and check for voltage. Turn engine and
MASTER switch OFF, and close generator cutout
switch. If voltage is present, repair/replace wire 2 of
engine disconnect to engine generator relay lead (see
paragraph 6-62). If voltage is not present, go to step
G.
2-132
