User's Manual

28636 - 28638 Page 13Page 12 28636 - 28638
ACCESSORY HARNESS
20 Gray & Gray/Black Alarm Inputs Accessory Harness
Important Note: If you want to use the keyless entry features only - with
no alarm functions - connect the GRAY wire to ground or set Option 24
(described in Step 29) for No Alarm mode .
The GRAY alarm input wire will accept any negative alarm input, including:
shock sensors, perimeter sensors, etc. When connecting a shock sensor or
microwave sensor, always use the GRAY wire. AutoCommand ignores this
input during the remote starting and when the AutoCommand is running the
vehicle, preventing false triggering.
Model 20038: If you are using the
included plug-in Shock Sensor --
simply plug it into the 3 pin connector jack shown on page 4. The GRAY
wire is in parrallel with the Shock Sensor’s output wire -- thus care needs
to be taken (i.e. diode isolate this wire) if you want to use the GRAY wire
for any other sensor as well.
If you are using a sensor or input that switches to (+) when triggered, you will
need to reverse the polarity with a relay before connecting to the GRAY wire.
The GRAY/BLACK wire is normally for the door pin switch and will be
temporarily disabled for the first 45 seconds of starting (this prevents ve-
hicles with dome light that come on when starting from activating the alarm
if the GRAY/BLACK wire is hooked to the door pin switch). This input is
polarity selectable. This means you can set it to respond to a positive input or
a negative input by setting the dip switch option 23 (described in Step 29).
Factory setting is negative trigger and the option setting is positive (typically
FORD vehicles).
Both inputs are isolated and independent. Since this unit is "last door arm-
ing" and "negative trigger", a faulty sensor will not affect the other sensor
input and will not render the alarm inactive. You should diode isolate the
inputs of two or more sensors on the same input wire.
16 Brown Wire Accessory Pulse/Dome LampControl Harness
The BROWN wire is the acessory pulse which gives you a quick pulse just
before the car starts or stops. This is a 500 mA transistor ground output which
MUST drive a relay (not included) which in turn will supply either ground or
positive signal. This is important in some vehicles to control the defroster or to
control the GM R.A.P. system, or to re-lock power door locks if the vehicle
automatically unlocks them whenever the vehicle stops running.
You can also use the dip-switch option 20 (described in Step 29) to change this
output to turn on the dome lamp when the doors are unlocked. This is a 500
mA transistor ground output which
MUST drive a relay which in turn will
supply either ground or positive signal to the door pin switch wire. Most GM
vehicles, most Chrysler vehicles and most Japanese vehicles require a ground.
Most Ford cars and trucks will require a positive +12 v output.
17 Brown/White Alarm Disable Control Harness
The BROWN/WHITE wire will put out a quick negative pulse just before
unlocking or starting the vehicle. This wire is used to turn off the factory
alarm. Connect this Brown/White wire directly to the factory alarm disarm
wire. This wire is usually located in the driver's kick panel. Refer to the
"factory disarm" column of the blue vehicle wiring guide to determine the
color code of your particular vehicle.
18 White/Black Wire IGN 3 / VATS Control Harness
The WHITE/BLACK wire is a 500 mA transistor ground output that acts just
like the IGN1 or IGN2 relay outputs. It is active during run and crank. This
wire MUST be set up to power a relay. With a relay, it can be used to power
the third ignition wire at the ignition key.
The WHITE/BLACK wire comes on before anything else, and turns off 2.5
seconds after the last wires turn off. Consequently one of the most common
uses for this wire is for a VATS disable wire. See SPECIAL CASES for using
this with the VATS system.
19 Red/White Wire Remote Input Control Harness
The RED/WHITE wire can be used to trigger the AutoCommand to start from
a source other than DesignTech’s remote control transmitter. Giving this wire
a negative pulse will cause the AutoCommand to start. Giving it another nega-
tive pulse will cause it to stop.