Audiovox APS-20LAD User Manual
Model APS-20LAD
Installation Manual
Vehicle Alarm System
With Channel 2 Auxiliary Output
Installation Instructions
This Unit Is Intended For Installation In Vehicles With
12 Volt Negative Ground Electrical Systems Only
Kit Contents:
APS-20LAD Control Module
(2) - Two Button Transmitters
2 Channel Code Learning Receiver
(1) - Multi Pin Input/Output Harness
(1) - Two Pin Door Lock Harness
(1) - Two Pin LED Indicator
(1) - Two Pin Valet / Programming Switch
Multi-tone Siren
(1) - 2 Stage Shock Sensor
(1) - Installation Manual
(1) - Operator's Manual
(1) - Limited Warranty
(2) - Window Decals
Released 9-24-99.
Revision A: Changed diagram 4-30-03.
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The APS-20LAD Vehicle Alarm System is designed to provide a basic deterrent to vehicle theft, and a convenient
electronic means to gain access to the vehicle by providing RF remote control over the vehicle's power door lock
system. The unit also includes outputs to control the vehicle's parking lights, and an additional auxiliary output
designed to allow for control over an optional device such as a power trunk release or engine starting device.
BEFORE BEGINNING THE INSTALLATION:
1) Find locations to mount the following items:
Control Module Shock Sensor
Electronic Siren Dash Mounted L.E.D.
Valet/Program/Manual Override Switch
2) Determine the type of factory power door lock system in use. Knowing the type of system up front
before beginning the installation can make the installation easier and faster since you can build whatever
interface (if needed) beforehand.
3) Determine whether the vehicle includes a power trunk release system, and if so what type it is.
CONTROL MODULE:
The Control Module is NOT waterproof, DO NOT mount it in the Engine Compartment. Select a mounting location
under the dashboard. Choose a mounting location that will not interfere with proper operation of the vehicle's
steering column mechanism, brake and gas pedals. Secure the Control Module in the chosen location. Wait until
all components have been installed and all connections are made before plugging in the main connectors.
SIREN:
Select a location in the engine compartment that is not accessible from below the vehicle. The selected location
must be clear of hot or moving parts within the engine compartment The siren must be pointed downward to
prevent water retention and the flared end must be pointed away from and out of the engine compartment for
maximum sound distribution. Before securing the siren, check behind your chosen location to assure that the
mounting screws will not penetrate any factory wiring or fluid lines. Secure the siren mounting bracket using #8 self
taping screws by first using the mounting bracket as a template, scribe or mark the three bracket mounting holes.
Drill the three marked holes using a 1/8" drill bit, than mount the siren using #8 sheet metal screws.
VALET/PROGRAM/MANUAL OVERRIDE SWITCH :
Since much of the use of this switch by the vehicle operator requires concurrent operation of the ignition key switch,
it is recommended that the Valet/Program/Manual Override Switch be placed such that it can be reached by the
driver's left hand, while they operate the ignition key switch with their right hand. It is also highly recommended that
this switch be concealed to provide the highest level of security. The switch can be mounted to the lower dash
panel in the driver's area. Inspect behind the chosen location to insure that adequate clearance is allowed for the
body of the switch, and also that the drill will not penetrate any existing factory wiring or fluid lines. Drill a 1/4" hole
in the desired location and mount the switch by passing it through the panel from the opposite side. Secure the
switch using the nut, star-washer, and on/off face plate. It is suggested that the switch be oriented to allow the on
position to be up toward the driver and the off position to be down or away from the driver. Route the switch’s wires
and connector toward the location of the Control Module.
DASH MOUNTED L.E.D.:
The small Red LED included in the kit serves as a visual indicator of the system's status and provides a visual
deterrent to a potential thief. The LED also provides important feed back information during the transmitter and
feature program modes. The LED should be installed in the dashboard in a highly visible area that may be seen
from the driver’s seat as well as from outside the vehicle. Try to choose a location close enough to the Control
Module so that the LED's wires will reach. Carefully inspect the area behind your chosen location to insure that the
drill will not penetrate any existing factory wiring or fluid lines. Drill a 1/4" hole and pass the connector end of the
LED through the hole, and route the wires toward the location of the Control Module. Press the LED firmly into place
until it is fully seated.
HOOD AND TRUNK PIN SWITCHES:
The pin switch included in this package is intended for protecting the hood or trunk/hatch areas of the vehicle. In all
cases, the switch must be mounted to a grounded metal surface. When the pin switch is activated, (hood/trunk
open), it will supply a ground to the input wire thus activating the alarm. Mount the switch in the hood or trunk
locations away from water drain paths. If necessary, the included bracket may be used to move the switch away
from rain gutters or allow mounting to the firewall behind the hood seal. In both cases the switch must be set up to
allow the hood or trunk door to depress the switch at least 1/4 inch when the hood or trunk is closed and fully
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extended when the hood or trunk is opened. For direct mounting, a 1/4 inch hole must be drilled. Carefully check
behind the chosen location to insure the drill will not penetrate any existing factory wiring or fluid lines. Drill a 1/4"
hole in the desired location and thread the pin switch into it using a 7/16" nut driver or deep well socket. If using the
mounting bracket, first secure the bracket to the desired location and secure the pin switch in the pre-threaded
mounting bracket hole.
WIRING CONNECTIONS:
RED Wire (Connects to RED/WHITE wire at harness plug): Main Power Input Wire
These are the main power input wires for the APS-20LAD system. Both wires connect to a separate fuseholder
contained in the harness. These fuseholders each hold a separate ATC fuse, one 5AMP and one 15AMP. This RED
wire must be connected to a constant power wire at the vehicle's ignition switch harness or fusebox. Most vehicles
have at least one battery source wire supplying power to the ignition switch.
Locate a constant power wire or power taping point either at the vehicle's ignition switch harness or fuseblock. This
wire will read +12VDC at all times, regardless of the position of the ignition key switch. Splice and tape the RED
wire of the harness to this point.
YELLOW Wire: Ignition Input Wire
This wire provides the APS-20LAD system with an ignition power input from the vehicle. Connect this wire to the
primary ignition wire from the ignition switch. This vehicle wire will show +12VDC when the ignition key is turned to
the "ON" or "RUN" position
key is turned to the "OFF" and "ACCESSORY" positions.
Locate an ignition power wire at the vehicle's ignition switch harness. Splice and tape the YELLOW wire of the
system to this point.
WHITE Wire: Positive Parking Light Flash Wire
This wire is designed to provide a +12VDC positive light flash output, driven by the APS-20's internal relay, to be
connected directly to the vehicle's positive parking light circuit. Once the feedpoint is located, confirm that all the
vehicle's parking lights will illuminate when +12VDC is connected to it.
NOTE: Some vehicles, (mostly European) have isolated "left" and "right" side parking lights. To connect to
the parking light systems in these vehicles, you must use 2 separate SPDT or DPST relays to connect
one to each side in order to keep them isolated.
Locate a parking light feedpoint and attach the WHITE wire of the system to this point.
BROWN Wire: Negative (-) Door Trigger Input Wire
If the vehicle's interior lights are controlled by
vehicles), the Brown
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 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
the Purple
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
should those entry points be violated. To provide protection for the hood, the Dark Green
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
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/
positive
door trigger wire should connect to one of the vehicle's factory door pin switches. In many cases
negative
and
when turned to the "START" or CRANK" positions, and will have 0VDC when the
door trigger wire should connect to one of the vehicle's factory door pin switches. In
+12VDC
grounding
grounding
hood, trunk, or rear hatch pin-switch, to allow the system to trigger
door pin-switches (typical of most GM, Dodge, and import
(Positive) door pin-switches (typical of most Ford vehicles),
negative
negative
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hood/trunk
hood/trunk trigger
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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 APS-20LAD. 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 APS-20LAD 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.
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 to the start (crank) position and will have 0
volts in all other key positions.
Connect one side of the cut wire to terminal #87a of the relay. Connect the other side of the cut wire to terminal #30
of the relay.
DARK BLUE Wire: Delayed 300mA Pulsed, Channel 2 Output
The Dark Blue wire supplies a 300mA ground pulsed output whenever channel two of the receiver is accessed.
Pressing the transmitter Option button for three seconds will access Channel 2. This is a low current output and
must be connected to a relay to supply power to the trunk release or the circuit you wish to control. Connect the
Dark Blue wire to terminal # 86 of a VF45F11 P&B relay or equivalent. Connect terminal # 85 of the relay to a fused
+12VDC source. Connect the common, normally open, and normally closed contacts of the relay to perform the
selected function of Channel 2.
DOOR LOCK/UNLOCK CONTROL HARNESS (+) and (-)
2-PIN White Plug w/2 Wires; RED & GREEN
The Red and Green Door Lock/Unlock output wires provide either a momentary pulsed ground (-) or a momentary
pulsed 12VDC (+) output for controlling a vehicle's power door lock/unlock circuit. In order to accomplish this "dual
polarity" output scheme these two wires produce the opposite polarity at the opposite time. To better understand
this, refer to the table below:
The output of these wires has a maximum switching capability of 300mA. Many vehicles today have factory door
lock relays which can be connected directly to these outputs, however always confirm that the factory relays in your
particular vehicle do not exceed the rated 300mA output of the units door lock/unlock circuit. Plug the two pin
connector of the door lock/unlock harness into the mating connector shell of the control module. Determine the
door lock circuit of the vehicle you are working on and wire according to the diagrams shown.
WIRING FOR "GROUND PULSE" DOOR LOCK CIRCUITS:
This is a system commonly used on most import vehicle's factory door lock/unlock systems, and with a few domestic vehicles which employ factory "keyless entry" systems. In this application, the Red wire serves as the "Lock"
output, providing a ground pulse during the arming sequence, and the Green wire serves as the "Unlock" output,
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Wire Color Function Polarity
Red Lock Ground (-)
Red Unlock Positiv e (+)
Green Lock Positiv e (+)
Green Unlock Ground (-)
providing a ground pulse during the disarming sequence.
Connect the Red wire to the low current ground factory door "Lock" signal wire leading from the factory switch to the
factory door lock relay. Connect the Green wire to the low current ground factory door "Unlock" signal wire leading
from the factory switch to the factory door unlock relay.
WIRING FOR "POSITIVE PULSE" DOOR LOCK CIRCUITS:
This is a system commonly used on many domestic vehicle's factory door lock/unlock systems, particularly General
Motors and Chrysler, although not on all models. (Please see the note regarding "5-Wire Reverse Polarity Door
Lock Systems"). In this application, the Green wire serves as the "Lock" output, providing a positive pulse during the
arming sequence, and the Red wire serves as the "Unlock" output, providing a positive pulse during the disarming
sequence.
Connect the Green wire to the low current positive (+12VDC) factory door "Lock" signal wire leading from the factory
switch to the factory door lock relay. Connect the Red wire to the low current positive (+12VDC) factory door
"Unlock" signal wire leading from the factory switch to the factory door unlock relay.
4 WIRE POLARITY REVERSAL and 5 WIRE ALTERNATING DOOR LOCK CONTROL CIRCUITS:
In these applications, the AS-9159 Door Lock Interface (or equivalent 30 Amp. automotive type relays) must be used.
Refer to the Audiovox Door Lock Wiring Supplement for proper connection to these types of circuits.
PLUG-IN CONNECTIONS AND COMPLETING THE INSTALLATION:
Now that all the other components have been installed, and most of the main connections completed, it is time to
finish connecting the remaining plug-in components and completing the installation. Even though these are plug-in
connections, and the plugs have been shaped such that they cannot be plugged in wrong, please read and follow
the instructions below for each connection to make certain each component is properly installed.
DASH MOUNTED LED
2-PIN White Plug w/2 Wires; Red & Blue
The Red & Blue wires in the 2-PIN mini white connector control the anode and cathode of the dash mounted LED.
Route the twin lead Red and Blue wires from the LED to the control unit and plug the two pin connector into the
mating white mini connector shell of the control module. Do not force the connector, it will only plug in one way.
SHOCK SENSOR
Mounting The Shock Sensor
Never mount the sensor outside the vehicle where it will be exposed to the elements. Never mount any component
near hot or moving parts. Always mount the components and route the wiring away from the rotating steering shaft
assembly. Always mount the sensor within 22" of the alarm module to assure the plug in cable reaches the sensor.
1. Select a solid mounting location inside the vehicle. Ideally the inside firewall, center of the vehicle is best for
sensitivity. An alternate location can be the "A" pillar, "B" pillar, or suspended from an existing brace or wiring
harness.
2. Mount the sensor using the two screws provided or cable ties securing it to your chosen location.
Connecting The Sensor:
1. Connect the large 4 pin connector of the wiring harness to the 4 pin mating connector on the Shock Sensor.
2. Route the small 4 pin connector of the harness toward the alarm control module and connect to the mating 4 pin
connector on the alarm unit.
VALET/PROGRAM/MANUAL OVERRIDE SWITCH
2-PIN Blue Plug w/2 Wires; Black & Gray
The Black & Gray wires in the 2-PIN blue connector are the ground supply and Valet/Program input of the
APS-20LAD unit. When the Gray wire is grounded, under certain conditions, the unit will enter the valet mode.
When the Gray wire is sequentially grounded under other conditions, the unit will enter the various program modes.
Route the Black and Grey wires from the Valet/Program/Manual Override switch to the APS-20LAD unit and plug the
blue 2-PIN connector into the mating blue connector shell of the APS-20LAD control module. Do not force the
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