BATTERY GUARD 2000
PRODUCT DESCRIPTION
SERVICE MANUAL
Battery Guard 2000
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
the voltage drops below 12.0 volts for approximately 4 minutes and the ignition is off, will
automatically disconnect thebattery 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, will automatically reconnect the battery.
NOTE
Battery Guard 2000
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.
is intended to be used in Fleet vehicles to prevent the battery from inadvertently being
constantly monitors the voltage level on the battery to determine the level of charge. When
Battery Guard 2000
Battery Guard 2000
is a battery charge saving device used to automatically switch off the battery in the event of
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. Tochange the stateof 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 ofthe relay.
CAUTION
Applying +12 volts to these terminals damage the controller.
The control module gets its power from the inline fuse connected to the Battery Disconnect relay. It monitors the
voltage on the battery through this lead. When it senses that the voltage on the battery is less than 12.0 volts, it
momentarily applies +12 volts to Battery Disconnect relay to disconnect the power. It then blinks the LED indicator
on the dash mounted reset switch to indicate the disconnect.
Intellitec
WILL
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
www.intellitec.com
1
P/N 53-00660-100 Rev. C 020105
BATTERY GUARD 2000
SERVICE MANUAL
The ignition input signal to the module is used to prevent the module from disconnecting the battery if the ignition
is on. This connection is important. Failure to make this connection could result in the disconnecting of the
battery while driving.
TESTING
The first step in testing is to locate and press the switch for a minimum of 3
seconds continuously. This will quickly determine if the system is working properly.
RESET SWITCH TEST
To test the system, turn off the ignition and press the switch for a minimum of 3 seconds continuously.
The battery should be disconnected and the dash mounted indicator should be blinking, momentarily. Press
the switch to reconnect the battery.
RESET
very
WARNING
This could lead to serious driving difficulties and a fatal accident.
Battery Guard 2000
RESET
RESET
Turn the ignition switch on, but start the engine. LED should illuminate for 2 seconds. Again, press the
RESET switch and hold for 3 seconds continuously. The disconnect relay should not click, but will remain ON. The
dash indicator should not beblinking.
If these steps work, the system is working properly. If they don’t, check the inline 5 Amp fuse and repeat the first
step. If thisfails to make the system work, further testing is required to determine the source of the failure.
SYSTEM TEST
The next step is to determine if the module is driving the Battery Disconnect relay coil. First, the Ignition should
be in the "OFF" position. Connect a test light across the “I” and “S” terminals of the relay. Press the
switch, hold for 3 seconds continuously and observe the light. It should blink on. Press the switch. The
light should blink on again. Failure to do this indicates the module, harness, or RESET switch is defective. The
most probable cause of failure is the module. If the test light blinks but the relay fails to click, the relay is
defective.
BATTERY DISCONNECT RELAY TEST
Before attempting to test the Battery Disconnect relay, the wire harness from the control module.
Failure to unplug harness before applying +12 volts to these terminals WILL damage the controller.
To latch or turn the relay on, ground the “S” terminal and apply +12 volts to the “I” terminal. The relay
should click and engage, closing the circuit between the battery and the electrical system. To unlatch or turn off the
relay, ground the “I” terminal and apply +12 volts to the “S” terminal. The relay should click, opening
the circuit between the battery and the electrical system.
DO NOT
RESET
RESET
UNPLUG
CAUTION:
momentarily
momentarily
CAUTION:
RESET SWITCH
The switch contains a LED and a momentary switch. To test if the switch is faulty, unplug the harness from
RESET
the switch. Using a small jumper wire, momentarily short between the black and violet leads of the harness. The
Disconnect relay should click andbe on. If the systemworks using the jumper the RESET switch is defective.
Intellitec
www.intellitec.com
Momentarily apply +12 Volts in both cases.
2
ONLY,
P/N 53-00660-100 Rev. C 020105
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
BATTERY GUARD 2000
SERVICE MANUAL
Trouble Shooting
A. System will not shut down with low
battery.
B. System turns off prematurely.
1. Check orange wire for ignition "hot" only.
2. Check in-line fuse.
3. Check ground connection.
4. Check battery voltage. Battery Guard will not turn off unless
battery voltage is below 12.0 volts and above 10.0 volts for
more than four minutes.
5. Check for blinking "LED" on switch.
a. If "LED" is blinking press the switch and listen for relay to
click.
(1) If relay does not click, replace module.
(2) If relay clicks, press the test switch and hold for
3 seconds. Listen for relay to click again.
(a) If relay does not click, replace module.
(b) If relay clicks but power remains on in the
van, replace relay.
b. If switch is not blinking, replace module.
1. Check battery voltage. If battery voltage is below 12.0 volts
Battery Guard 2000 will turn off.
2. Check fuse connection for corrosion and possible voltage
drop.
3. Check ground connection.
4. Check switch for blinking "LED".
a. If switch is blinking, replace module.
b. If switch does not blink, but power to van is turned off,
replace relay.
C. System will not turn back on after
disconnecting.
Note: These trouble shooting techniques are only intended as general guidelines and should not be interpreted as
addressing all possible electrical problems.
Intellitec
www.intellitec.com
1. Check in-line fuse.
2. Check ground connection.
3. Battery voltage must be above 10.0 volts for Battery Guard
2000 to operate.
4. To start test, press switch and hold continuously for 3
seconds.
5. Check for blinking "LED" on reset switch.
a. If LED is not blinking, replace module.
b. If "LED" is blinking press the reset switch and listen for
relay to click.
(1) If relay does not click, and "LED" continues to blink,
replace reset switch.
(2) If relay does not click, and "LED" stops blinking,
replace module.
(3) If relay clicks but power does not turn on in vehicle,
replace relay.
3
,
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00660-100 Rev. C 020105
BATTERY GUARD 2000
SERVICE MANUAL
RELAY
DISCONNECT
Module Connections
A - “I” Terminal - White
B - +12 Volts - Red
C - Ground - Black
D - “S” Terminal - Brown
E - Ignition - Orange
F - Ground - Black
G - Switch - Violet
H-LED- Yellow
DIAGRAM
TYPICAL WIRING
DE
MODULE
CONTROL
A
H
SWITCH
P/N 37-10104-000
& CONNECTIONS
OPTIONAL:
EATON
RESET
SWITCH
RESET
A
DE
MODULE
CONTROL
SWITCH
H
JUMPER
FIGURE 1
Intellitec
www.intellitec.com
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
4
P/N 53-00660-100 Rev. C 020105
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