Directed Electronics 3808A Installation Manual page 6

This system can be configured in two different ways.
1. as an add-on security system to the vehicles factory keyless entry system.
2. as a full security system added to the vehicle.
This guide covers the installations of both configurations and is labeled respectively.
BLACK (-) CHASSIS GROUND
This wire is the main unit's source of ground. DO NOT connect this wire to any factory ground points; they
can cause noise and/or current loss which can affect system performance. Ground the main unit and any
accessories to the same point in the vehicle, (preferably the kick panel). Scrape away any paint and use a
factory bolt or make your own ground with a self-tapping screw and a star washer
[Required connection for both configurations]
RED (+) 12V CONSTANT INPUT
This wire supplies power to the main units' micro-controller. Remove the supplied fuse before connecting to
the positive terminal of the battery or a constant +12V supply to the ignition switch.
Note: Always use a fuse within 12 inches of the point you obtain (+)12V. Do not use the 15A fuse in the
harness for this purpose. This fuse protects the module.
[Required connection for both configurations]
WHITE/BLACK LIGHT FLASH ISOLATION WIRE (PIN 87a of onboard relay)
This wire is a parking light flash input from the vehicle light switch that connects to pin 87a of the on-board
light flash relay. It is used for vehicles requiring light switch isolation during light flash output. For vehicles
with multiplex light circuits that require switch isolation, the on-board light flash fuse can be replaced with
the specified resistor value (paying attention to the circuit polarity). See diagram below for wiring informa-
tion.
Note: Replace fuse with speci ed resistor value
if connecting to multiplex light circuit
(paying special attention to polarity selection).
Light Flash
Polarity Jumper Detail
[Vehicle specific optional connection both configurations]
6
LIGHT FLASH POLARITY
(10A (MAXIMUM) FUSE JUMPER)
WHITE/BLACK
Light Switch
Multiplex wire
in vehicle
WHITE
Cut To control module
X X
in vehicle
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