MEGATRONIX
KP20 – PROGRAMMABLE ILLUMINATED DIGITAL KEYPAD IMMOBILIZER
INSTALLATION AND WIRING INSTRUCTIONS
WARNING: NOT RECOMMENDED TO USE THIS
SYSTEM TO INTERRUPT IGNITION OR FUEL PUMP.
1.
Connect all the wires per wiring diagram:
a. RED Wire – System Power, Positive (+):
Connect to a constant positive 12 or 24 volt
battery source (Fused connection recommended).
b. BLACK Wire – System Ground, Negative (–):
Connect to a clean, solid, unpainted section of the
vehicle frame. Do not connect this wire to any
existing ground wires supplied by the factory wire
loom. Make connection to vehicle's frame directly.
c. BROWN Wire – Horn Honk Output, Negative (–)
(OPTIONAL FEATURE):
The vehicle’s horn can be used as a warning
audible device. It is a transistorized low current
output (–200mA). Connect to the low current
ground (negative) output from the vehicle's horn
switch. Adding a relay as below is recommended.
NEGATIVE SWITCHED HORN
(+) BAT TERY
SOURCE
(–) VEHICLE HO RN
8 6
SW IT CH OUTPUT
(–) BRO WN WIRE
HORN OUTPUT
(–) G RO UND SOURCE
8 5
8 7
30
If the vehicle uses a positive (+) horn switch, a
20/30Amp SPDT automotive relay is required to
convert the brown wire to positive. Connect relay
terminal 86 to the brown wire. Connect relay
terminal 87 to the low current positive (+) horn
switch output. Connect relay terminals 85 and 30
to a fused positive (+) battery source.
POSITIVE SWITCHED HORN
(+) BAT TERY
SOURCE
(+) VEHICL E HORN
8 6
SW IT CH OUTPUT
(–) BRO WN WIRE
HORN OUTPUT
(+) BATT ERY SOURCE
8 5
8 7
30
d. ORANGE Wire – Starter Disable Output,
Negative (–):
This wire is provided to control the starter disable
relay. It gives a constant ground (negative) output
while the system is armed (–200mA). Connect this
wire to terminal 86 of the starter disable relay.
e. YELLOW Wire – Ignition Switched Input,
Positive (+):
This wire receives positive (+) when the ignition
switch is in the "ON" and "START" positions and
receives "0" volts when the ignition switch is in the
"OFF" position. Connect this wire to the positive
(+) ignition crank source wire as well as terminal
85 of the starter disable relay.
f. Starter Disable Wiring:
Find the starter solenoid wire (usually located on
starter) that goes to the ignition switch.
Using a voltmeter, connect one probe of the
voltmeter to ground and connect the other end of
the probe to the starter wire, it should receive
positive (+) only when the ignition key is in the
START (CRANK) position.
Cut the starter wire and try to start vehicle. The
engine should not crank over.
If the wires need to be extended, they must be the
same gauge as the cut starter wire.
Connect key switch wire to terminal 30 and starter
wire to relay terminal 87a of the disable relay.
2.
Mount the keypad on the dashboard close to the
operating area with either double sided tape or the
bracket and screws provided.
3.
Hide the relay and socket where intruders cannot
easily locate them.
4.
After installing, enter the default code to test the unit
for functionality.
5.
Asterisk (*) LED is blue and indicates system status.
All other LEDs are red including number sign (#).
