Table of Contents
Advertisement
FIGURE 2-2. BATTERY CONTROL BOX
1. Battery Control Box
Assembly
2. Starter Circuit
Disconnect Switch
3. 24VDC Circuit
Disconnect Switch
4. 12VDC Circuit
Disconnect Switch
D2-4
5. Auxiliary Battery
Connectors
6. 12VDC Circuit Breaker
7. System Battery Starter
Disconnect Relay
8. Battery Equalizer
24VDC Electric Supply System
Battery Disconnect Switches
The three battery switches provide a convenient
method of disconnecting the truck batteries from the
truck electrical circuits.
The rear disconnect switch (2) opens the starter battery
circuit only, preventing engine startup while still allow-
ing battery power to the 24VDC control system circuits
if desired.
The front switches are ganged to ensure both are
opened or closed at the same time. The middle switch
(3) disconnects the 24VDC circuit and the front switch
(4) controls the 12VDC circuit.
24VDC Auxiliary Battery Connectors
Two pairs of receptacles (5), located adjacent to the
battery disconnect switches are provided to attach
battery charger leads for charging the truck batteries.
In addition, these receptacles can be used for connect-
ing external batteries to aid engine starting during cold
weather. When external batteries are used, they should
be of the same type (8D) as the batteries installed on
the truck. Two pairs of batteries should be used. Each
pair should be connected in series to provide 24VDC,
with one pair connected to the top receptacle and the
other pair connected to the bottom receptacle on the
truck.
NOTE: If both the truck cranking batteries and the
system batteries are discharged, the system batter-
ies must be recharged before attempting to start
the engine. The external starting batteries provide
additional current for starter motor operation only.
The system batteries are disconnected from the
external (auxiliary) batteries
mounted cranking batteries while the engine
starter is engaged.
and the truck
D02018
Advertisement
Table of Contents
Troubleshooting
