Audiovox APS-20B User Manual
Model APS-20B
Installation Manual
V ehicle Alarm System
With Auxiliary Output
Installation Instructions
This Unit Is Intended For Installation In V ehicles With
12 Volt Negative Ground Electrical Systems Only
Kit Contents:
APS-20B Control Module
(2) - Three Button T ransmitters
3 Channel Code Learning Receiver
(1) - Multi Pin Input/Output Harness
(1) - T wo Pin Door Lock Harness
(1) - T wo Pin LED Indicator
(1) - T wo Pin V alet / Programming Switch
Multi-tone Siren
(1) - Installation Manual
(1) - Operator's Manual
(1) - Limited Warranty
(2) - Window Decals
The APS-20B 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
Electronic Siren
Dash Mounted LED
Valet/Program/Manual Override Switch
2) Determine the type of factory power door lock system in use. Knowing the type of system before beginning
the installation can make the installation easier and faster since you can build whatever inte rface (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 tapping 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, then 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 LED:
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
2
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
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 APS20B 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 tapping 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 APS20B 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
when the 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 APS20B'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
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.
positive
negative
door trigger wire should connect to one of the vehicle's factory door pin switches. In many
and
when turned to the "START" or CRANK" positions. This wire will have 0VDC
grounding
door trigger wire should connect to one of the vehicle's factory door pin switches. In
+12VDC
door pin-switches (typical of most GM, Dodge, and import
(Positive) door pin-switches (typical of most Ford vehicles),
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