TM 10-3930-641-20
ELECTRICAL SYSTEM DESCRIPTION
(Sheet 1 of 3)
3.
LEFT HAND INSTRUMENT PANEL. Contains lights which
The major components of the electrical system are:
illuminate to provide visual indication of vehicle operating cxm-
diticm. Also contains light switches, service meter, wiper/washer
Engine stop solenoid
1.
switch and fuses.
2.
Batteries (4)
4.
RIGHT HAND INSTRUMENT PANEL. Contains gages to indi-
cate vehicle operating conditions. Also contaks POWER switch
3.
Left hand instrument panel
and fuses.
Right hand instrument panel
4.
5.
CONTAINER LOCK INDICATOR PANEL. contains lights
which indicate top handler locked/unlocked condition.
Container lock indicator panel
5.
ETHER AID SOLENOID. Opens to allow ether to enter the
6.
Ether aid solenoid
6.
turbocharger outlet when the START AID switch is pushed dur-
ing cold weather starting. The ether aid solenoid will not adi-
7.
Starting motor
vate if temperature is above 80F (26.7C).
Starter solenoid
8.
7.
STARTING MOTOR. Used to turn the engine fast enough to
get the engine running. It is activated only when the starter
Engine relay panel
9.
solenoid contacts are closed.
10. Main disconnect switch
8.
STARTER SOLENOID. Engages the starter pinion with the
flywheel ring gear and closes the starting motor circuit. This
11. Alternator
happens only when the POWER, switch is turned to START
and the transmission is in NEUTRAL.
12. Wiring harness.
9.
ENGINE RELAY PANEL. Contains engine harness connectors,
engine relays, diodes and circuit breakers in one easily accessed
ENGINE STOP SOLENOID. Closes the fuel supply to the fuel
1.
location.
injection pump when the POWER switch is turned to OFF which
stops the engine.
BATTERIES (4). Two sets of 12-volt batteries, one set on each
2.
side of the engine near the radiator, are connected in a series-
parallel arrangement to provide 24 volts dc to the vehicle
electrical system.
Go on to Sheet 2
1-17
