131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00660-100 Rev. A 081401
www.Intellitecsve.com
Intellitec
SERVICE MANUAL
BATTERY GUARD 2000
PRODUCT DESCRIPTION
Battery Guard 2000
is intended to be used in Fleet vehicles to prevent the battery from inadvertently being
discharged by some unwanted load. This may happen if a light or other accessory is left on for long periods of time.
Battery Guard
2000
constantly monitors the voltage level on the battery to determine the level of charge. When the
voltage drops below 12.0 volts for approximately 4 minutes and the ignition is off,
Battery Guard 2000
will
automatically disconnect the battery from the vehicle’s electrical system.
If the ignition switch is turned on, the system will not disconnect the battery under any circumstances. This feature
prevents a shutdown in the event of a charging system failure while driving.
When the battery is disconnected, a LED indicator on the dash mounted switch blinks to let the driver know that the
system has disconnected the battery. To reconnect the battery, the driver needs to press the momentary switch. The
system now allows the driver 4 minutes to start the vehicle before the battery disconnects again.
If, while the battery is disconnected, the battery voltage goes above 13 volts, as would happen during a “jump start” or
if a charger is connected,
Battery Guard 2000
will automatically reconnect the battery.
NOTE
Battery Guard 2000
is a battery charge saving device used to automatically switch off the battery in the event of a low
charge condition while the ignition is in the OFF state. Power from the battery is connected directly to the disconnect
solenoid, without any circuit protection. Inadvertent shorts of the battery cable could result in damage and/or injury.
All Servicing of the system should be done only by a qualified technician.
Tools Required: Low Current test light, DC voltmeter.
HOW IT WORKS
The system consists of the Intellitec Battery Disconnect relay, the control module, the dash mounted reset switch, and
the inter-connect harness. See Figure 1.
The Battery Disconnect relay is normally mounted under the hood, near the battery to keep the heavy battery cable
length to a minimum. The relay is a mechanically latched unit that maintains electrical connection or remains open
without requiring any power from the battery. To change the state of this relay, 12 volts is momentarily applied to the
two small, “I” and “S” terminals. To open the relay, +12 volts is applied to the “S” terminal and ground to the “I”
terminal. To close the relay, +12 volts is applied to the “I” terminal and ground to the “S” terminal. Normally, the Battery
Guard controller grounds both terminals of the relay.
CAUTION
Ap12 volts to these terminals
WILL
damage the controller.
1
