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to connect to only one door switch in order to detect the opening of all doors. In a few cases this will not be
true, making it necessary to connect to the vehicle dome light, or isolate door trigger wires.
Locate the vehicle's negative door trigger wire in the vehicle's kick panel, under-dash or the vehicle's
pin-switch. Splice and tape the BROWN wire of the system to this point.
PURPLE Wire:
Positive (+) Door Trigger Input Wire
If the vehicle's interior lights are controlled by
+12VDC
(Positive) door pin-switches (typical of most Ford
vehicles), the Purple
positive
door trigger wire should connect to one of the vehicle's factory door pin
switches. In many cases the factory door pin-switches are wired in parallel, making it necessary to
connect to only one door switch in order to detect the opening of all doors. In a few cases this will not be
true, making it necessary to connect to the vehicle dome light, or isolated door trigger wires.
Locate the vehicle's positive door trigger wire in the vehicle's kick panel or under-dash. Splice and tape the
PURPLE wire of the system to this point.
DARK GREEN Wire:
Negative (-) Hood/Trunk Trigger Input Wire
This input is designed to connect to a
grounding
hood, trunk, or rear hatch pin-switch, to allow the system
to trigger should those entry points be violated. To provide protection for the hood, the Dark Green
negative
hood/trunk trigger wire should connect to the existing factory hood pin-switch (if one exists) or to
a suitable aftermarket installed hood pin-switch. To provide protection for the trunk or hatch, the Dark
Green
negative
hood/trunk trigger wire should connect to the existing factory trunk or hatch pin-switch
wire that controls the trunk or hatch light circuit. In cases where both hood and trunk/hatch entry points
are to be connected together to the Dark Green wire, barrier diodes must be used to prevent the flow of
current from causing the under hood light to come on when the trunk/hatch is opened, and vice-versa. If
only the hood, or only the trunk/hatch is connected to the Dark Green wire, no diode is needed.
Note:
The diodes which may be required for certain types of installations are the common 1N4000 series
type. You may chose to use any of the diodes in this series, with the 1N4003 and 1N4007 being the most
common types. The diodes must be installed with careful regard for their direction of current flow.
Note:
This wire will be shunted when remote control channel 2 is accessed, (trunk release). This wire will
remain shunted all the while there is ground present and for 5 seconds after the ground is removed. This
allows the operator to open the trunk via the remote transmitter without having to first disarm the alarm system.
WHITE/BLACK Wire:
Siren Output Wire
This wire provides a positive output (3A Max.) designed to directly drive a standard electronic siren. Find
a suitable mounting location for the siren and mount it properly. Run the Red wire of the siren into the
passenger compartment to the location of the PRO 9842. Connect the White/Black wire to the Red wire
from the siren. The Black wire from the siren should then be securely grounded to the vehicle chassis.
BLACK Wire:
Main System Ground
This is one of the most important wires of the PRO 9842 installation. It must be connected properly to a
solid chassis ground it will help ensure reliable system operation. Special care must be taken to locate a
clean metal part of the chassis as an attachment point for this wire. Some installers prefer to locate a
sturdy metal bolt under the dashboard or at the kick panel, and use it as the attachment point.
If you find a suitable factory bolt that reads ground when tested, attach a insulated ring terminal connector to
the Black wire, remove the bolt, place the red ring terminal over the bolt and reinstall it, tightening it securely.
If you choose instead to drill your own mounting hole into the vehicle's chassis, be certain to remove any
paint or grease and secure the ring terminal using the self taping screw and star washer provided.
ORANGE Wire:
Ground When Armed Output (Optional relay required.)
This wire provides a 300mA ground output when the alarm circuit is armed to control the starter inhibit
relay. Connect the Orange wire to terminal #86 of a standard SPDT relay. Connect terminal #85 of the
relay to an ignition wire in the vehicle that is +12VDC when the ignition key is turned to the on and start
positions and off when the key is in the off position. Locate and cut the low current starter solenoid wire
found at the vehicle's ignition switch harness. This wire will have +12VDC when the ignition key is moved
