NOTE: This product is intended for installation by a professional installer only!
Any attempt to install this product by any person other than a trained professional
may result in severe damage to a vehicle’s electrical system and components.
Model S400
installation guide
3
table of contents
primary harness (H1) wire connection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
primary harness wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
relay harness wire connection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
relay harness wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
relay harness wiring instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
door lock harness wire connection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
identifying the door lock system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
type A: positive-triggered, relay-driven system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
type B: negative-triggered, relay-driven system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
type C: reversing polarity system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
type D: adding one or more after-market actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
type E: electrically-activated vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
type F: one-wire system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
type G: positive (+) multiplex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
type G door lock system wiring diagram: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
type H: negative (-) multiplex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
type H door lock system wiring diagram: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
peripheral plug-in harnesses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
LED, 2-pin WHITE plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
override switch, 2-pin BLUE plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
programmer interface, 3-pin BLACK plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
mounting the receiver/antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
shock sensor harness, 4-pin WHITE plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
programming jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
light flash jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
bypassing sensor inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
module programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
module programming menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
menu #1 - basic features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
menu #2 - Advanced Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
feature descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
menu #1 - basic features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
menu #2 - advanced features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
remote coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
remote configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
standard configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
single button arm/disarm configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
arm/disarm diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
system status chirps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
table of zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
security diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
remote sensor bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
anti-carjacking system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
false alarm prevention circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
4
primary harness (H1) wire connection guide
primary harness wiring diagram
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Primary Harness Wiring Instructions
This guide describes in detail the connection of each wire. Also included are possible applications of
each wire. This system was designed with the ultimate in flexibility and security in mind. Many of the
wires have more than one possible function. Please read carefully to ensure a thorough understanding
of this unit.
H1/1 ORANGE (-) ground-when-armed output
This wire supplies a (-) ground as long as the system is armed. This output ceases as soon as the sys-
tem is disarmed. The orange wire is pre-wired to control the 8618 starter kill relay. It can supply up to
500 mA of current.
NNOOTTEE::
If using the H1/1 Orange wire to activate an add-on accessory such as window automation,
pager or voice module a 1Amp diode must be installed to ensure proper operation. Insert the diode as
shown in the following diagram.
IImmppoorrttaanntt!!
Never interrupt any wire other than the starter wire.
RED/WHITE Channel 2 Relay Output #30
RED (+) Constant Power Input
BROWN (+) Siren Output
YELLOW (+) Switched Ignition Input, Zone 5
BLACK (-) Chassis Ground Input
VIOLET (+) Door Trigger Input, Zone 3
BLUE (-) Instant Trigger Input, Zone 1
GREEN (-) Door Trigger Input, Zone 3
BLACK/WHITE Domelight Supervision Relay Output #30
WHITE/BLUE (-) 200 mA Channel 3 Programmable Output
WHITE (+)/(-) Selectable Light Flash Output
ORANGE (-) 500 mA Armed Output
H1/1
H1/2
H1/3
H1/4
H1/5
H1/6
H1/7
H1/8
H1/9
H1/10
H1/11
H1/12
5
H1/2 WHITE (+/-) light flash output
As shipped, the H1/2 WHITE wire should be connected to the (+) parking light wire. If the light flash
polarity jumper is moved to the (-) position (see the Programming Jumper section of this installation
guide), this wire supplies a (-) 200 mA output. This is suitable for driving (-) light control wires in Toyota,
Lexus, BMW, some Mitsubishi, some Mazda, and other models.
NNoottee::
For parking light systems that draw 10 amps or more, the jumper must be switched to a (-) light flash
output (see the Programming Jumpers section of this guide). A standard automotive SPDT relay must be
used on the H1/2 light flash output wire.
IIMMPPOORRTTAANNTT!!
DO NOT connect this wire to a negative vehicle light flash wire before
changing the programming jumper to the negative polarity position or damage to vehicle
light circuit may occur.
6
H1/3 WHITE/BLUE 200 mA (-) channel 3 output
This wire provides a (-) 200 mA output whenever the remote button(s) controlling Channel 3 is pressed.
This output can be programmed to provide the following types of output (see System Features Learn
Routine section of this guide):
➤➤
A validity output will send a signal as long as the transmission is received.
➤➤
A latched output will send a signal continuously when the Channel 3 button(s) is pressed and
released. The signal will continue until channel three is pressed again.
➤➤
A latched/reset with ignition output works similar to the latched output, but will also reset (output
will stop) when the ignition is turned on and then off.
➤➤
A 30 second timed output will send a signal for 30 seconds when channel three is pressed. This
output can be shut off during the 30-second period by pressing Channel 3 again.
➤➤
This output can also be programmed to provide a second unlock pulse when the unlock button is
pressed a second time after disarming the system. This can be used to unlock the passenger doors
when installing progressive door locks.
H1/4 BLACK/WHITE high current output from on-board domelight supervision relay
Connect this wire directly to the domelight circuit in the vehicle. The on-board relay will drive circuits
up to 20 amperes. The polarity of this output is determined by the connection of the input wire H2/B
in the Relay Harness.
NNOOTTEE::
If the input wire H2/B is not connected, there will be no output on this wire.
H1/5 GREEN (-) door trigger input
Most vehicles use negative door trigger circuits. Connect the green wire to a wire showing ground when
any door is opened. When connecting to newer model vehicles there is generally a need to use individ-
ual door triggers. This wire will report Zone 3.
NNOOTTEE::
If using a door trigger wire that has a delay, Advanced Menu 2, feature 6, or the Pro Security
Programmer can be used to turn open zone notification off.
IIMMPPOORRTTAANNTT!!
Never use this wire to drive anything but a relay or a low-current input! This
transistorized output can only supply 200 mA, and connecting directly to a solenoid, motor,
or other high-current device will cause the module to fail.
7
H1/6 BLUE (-) instant trigger input
This input will respond to a negative input with an instant trigger. It is ideal for hood and trunk pins and
will report on Zone 1. It can also be used with single-stage sensors. The H1/6 blue instant trigger wire
can also be used to shunt sensors during operation of auxiliary channels or remote start. (See
Bypassing Sensor Inputs section of this guide.)
H1/7 VIOLET (+) door trigger input
This type of dome circuit is used in many Ford products. Connect the violet wire to a wire that shows
(+)12V when any door is opened. This wire will report Zone 3.
NNOOTTEE::
If using a door trigger wire that has a delay, Advanced Menu 2, feature 6, or the Pro Security
Programmer can be used to turn open zone notification off.
H1/8 BLACK (-) chassis ground connection
Connect this wire to a clean, paint-free metal location (driver kick panel) using a factory bolt that DOES
NOT have any vehicle component grounds attached to it. A screw should only be used when in con-
junction with a two-sided lock washer. Under dash brackets and door metal are not acceptable ground
points. It is recommended that all security components be grounded at the same location.
8
H1/9 YELLOW (+) ignition input
Connect this wire to the (+) 12 volts ignition wire. This wire is pre-wired to the starter kill relay and must
show (+) 12 volts with the key in RUN position and during cranking. Take great care that this wire can-
not be shorted to the chassis at any point.
\\\\\\\
H1/10 BROWN (+) siren output
Connect this to the RED wire of the siren. Connect the BLACK wire of the siren to (-) chassis ground,
preferably at the same point you connect the control module’s BLACK ground wire.
H1/11 RED (+)12V constant power input
Before connecting this wire, remove the supplied fuse. Connect to the battery positive terminal or the
constant 12V supply to the ignition switch.
NNOOTTEE::
Always use a fuse within 12 inches of the point you obtain (+)12V. Do not use the 15 fuse in the
harness for this purpose. This fuse protects the module itself.
H1/12 RED/WHITE high current output from on-board channel 2 (trunk release) relay
Whenever the button(s) controlling channel two is pressed for 1.5 seconds, the on-board relay is acti-
vated and will stay activated as long as the transmission continues. This relay is often used for trunk
release. The relay can drive circuits up to 20 amperes. The polarity of this output is determined by the
connection of the input wire H2/A in the Relay Harness.
NNOOTTEE::
If the input wire H2/A is not connected, there will be no output from the relay when it is activated.
9
relay harness wire connection guide
relay harness wiring diagram
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**NNOOTTEE::
VIOLET and VIOLET/BLACK are common at fuse holder.
relay harness wiring instructions
H2/A RED/WHITE input to on-board channel 2 (trunk release) relay
This wire is used to supply voltage to the output H1/12. If you want a positive output on H1/12, con-
nect this wire to (+) 12 volts. Always fuse appropriately. If a negative output is desired, connect this
wire to chassis ground.
H2/B BLACK/WHITE input to domelight supervision relay
This wire is used to supply voltage to the output H1/4. If you want a positive output on H1/4, connect
this wire to (+) 12 volts. Always fuse appropriately. If a negative output is desired, connect this wire to
chassis ground.
H2/C - H2/8 power door locks
The system has door lock relays on-board, and can directly interface with most electric power door lock
systems drawing 30 amps or less. It can also drive aftermarket actuators directly.
VIOLET* Unlock #87 Normally Open (Input)
BLUE/BLACK Unlock #30 Common (Output)
BROWN/BLACK Unlock #87a Normally Closed
VIOLET/BLACK* Lock #87 Normally Open (Input)
GREEN/BLACK Lock #30 Common (Output)
WHITE/BLACK Lock #87a Normally Closed
BLACK/WHITE DomeLight Supervision relay Input #87
RED/WHITE Channel 2 Relay Input #87
H2/A
H2/B
H2/C
H2/D
H2/E
H2/F
H2/G
H2/H
10
door lock harness wire connection guide
identifying the door lock system
The easiest way to determine which type of door lock system you are working with is to remove the
master locking switch itself, which is usually on the driver’s door or on the center console. Once you
have determined which type of factory door lock circuit you are working with, and the color codes of
the switch wires to be used, you can usually simplify the installation by locating the same wires in the
vehicle’s kick panel.
NNoottee::
Always retest the kick panel wires to make sure they work the same as the wires on the switch.
There are six different types of common door lock circuits (some vehicles use more unusual systems):
➤➤
Type A - Three-wire (+) pulse controlling factory lock relays. This system is most commonly found
in GM, some Ford and Chrysler, 1995 Saturn, some newer VW, and newer BMW.
➤➤
Type B - Three-wire (-) pulse controlling factory lock relays. This system is found in most Asian
vehicles, early Saturn, some BMW and Porsche.
➤➤
Type C - Direct-wired reversing-polarity switches. The switches are wired directly to the motors. This
type of door lock system has no factory relays. This system is most commonly found most Fords,
many GM two-door cars and trucks, and many Chryslers.
➤➤
Type D - Adding one or more aftermarket actuators. These include slave systems without an actuator
in the driver’s door, but with factory actuators in all the other doors. Type D also includes cars
without power locks, which are having actuators added. All Saab before 1994, all Volvo except
850i, all Subaru, most Isuzu, and many Mazda. Some mid-eighties Nissans, pre-1985 Mercedes-
Benz and Audi.
➤➤
Type E - The vehicle must have an electrically activated vacuum system in each door. Make sure that
locking the doors from the driver's or passenger side using the key activates all the actuators in the
vehicle. This requires a slight modification to the door lock harness. Mercedes-Benz and Audi 1985
and newer.
➤➤
Type F - One-wire system, cut to lock, ground to unlock. This system is found in the late-model
Nissan Sentra, some Nissan 240SX, and Nissan 300ZX 1992-up. It is also found in older
Mitsubishi, and some early Mazda MPV’s.
➤➤
Type G - Positive (+) multiplex. A resistor interface module may be used for this type of door locking
system. This system is found in the 2001 and newer GM Aztek.
➤➤
Type H - Negative (-) multiplex. A resistor interface module may be used for this type of door
locking system. This system is found in 1999 and newer Grand Am and Alero models, as well as
2000 and new Impala and Monte Carlo models.
11
At the Switch
➤➤
Three-wire switches will have either a constant ground input or a constant (+)12V input, along with
the pulsed lock and unlock outputs to the factory relays.
➤➤
Some vehicles have no external switch. The switches are inside the actuator, and instead of pulsing,
the proper wires will flip-flop from (+)12V to (-) ground as the door locks are operated.
➤➤
Direct-wired switches will have a (+)12V constant input and one or two (-) ground inputs, along
with two output leads going directly to the lock motors.
type A: positive-triggered, relay-driven system
12
type B: negative-triggered, relay-driven system
type C: reversing polarity system
Use these instructions if the power door lock switch has four or five heavy-gauge wires. This type of
switch has two outputs that rest at (-) ground.
It is critical to identify the proper wires and locate the master switch to interface properly. Locate wires that
show voltage when the switch is moved to the lock or unlock position. Cut one of the suspect wires and
check operation of the locks from both switches. If one switch loses all operation in both directions then
you have cut one of the correct wires and the switch that is entirely dead is the master switch. If both switch-
es still operate in any way and one or more door motors have stopped responding entirely, you have cut
a motor lead. Reconnect it and continue to test for another wire. Once both wires have been located and
the master switch identified, cut both wires and interface as described in the following paragraphs.
IIMMPPOORRTTAANNTT!!
To interface with these systems, you must cut two switch leads. The relays must
duplicate the factory door lock switches’ operation. The master switch will have one or two
ground inputs, one (+)12V input, and two switch outputs going directly to the slave switch
and through to the motors. These outputs rest at (-) ground. The lock or unlock wire is
switched to (+)12V, while the other wire is still grounded, thus completing the circuit and
powering the motor. This will disconnect the switch from the motor before supplying the
motor with (+)12V, avoiding sending (+)12V directly to (-) ground.
13
➤➤
H2/C WHITE/BLACK - Once both door lock wires are located and cut, connect the white/black
wire to the master switch side of the lock wire. The master switch side will show (+)12V when the
master switch is operated to the lock position and (-) ground when the master switch is in the middle
position.
➤➤
H2/D GREEN/BLACK - Connect the green/black wire to the other side of the lock wire. This is the
motor side of the lock wire and it goes to the lock motor through the slave switch.
➤➤
H2/E VIOLET/BLACK - This wire must be connected to a constant (+)12 volts. The best connection
point for this wire is the constant (+)12V supply for the door lock switch, or directly to the positive
(+) battery post with a fuse at the battery post.
NNOOTTEE::
Except in GM cars with Retained Accessory Power (RAP). In these vehicles, the (+)12V feed to the
door lock switches is turned off if the doors are closed for any length of time.
NNOOTTEE::
Most direct-wired power lock systems require 20-30 amps of current to operate. Connecting the
violet/black wire to a poor source of voltage will keep the door locks from operating properly.
➤➤
H2/F BROWN/BLACK - Connect the brown/black wire to the master switch side of the unlock wire.
The master switch side will show (+)12V when the master switch is in the unlock position and (-)
ground when the master switch is in the middle position.
➤➤
H2/G BLUE/BLACK - Connect the blue/black wire to the other side of the unlock wire.
IIMMPPOORRTTAANNTT!!
If these wires are not connected properly, you will send (+)12V directly to (-)
ground, possibly damaging the alarm or the factory switch.
14
15
type D: adding one or more after-market actuators
Vehicles without factory power door locks require the installation of one actuator per door. This requires
mounting the door lock actuator inside the door. Other vehicles may only require one actuator installed
in the driver's door if all door locks are operated when the driver's lock is used.
16
type E: electrically-activated vacuum
This system is found in Mercedes-Benz and Audi 1985 and newer. The door locks are controlled by an
electrically activated vacuum pump. Control wire will show +12V when doors are unlocked and (-)
ground when doors are locked.
DIA-94
15A
CHASSIS
GROUND
TO ELECTRIC
VACUUM PUMP
TO 12 VOLTS
X
X
H2/A
H2/B
H2/C
#87
#87a
#87a
#30
#30
H2/D
H2/E
H2/F
H2/G
H2/H
TO H1/12
RED/WHITE CHANNEL 2 RELAY INPUT #87
WHITE/BLACK LOCK #87A NORMALLY CLOSED
GREEN/BLACK LOCK #30 COMMON (OUTPUT)
VIOLET/BLACK LOCK #87 NORMALLY OPEN (INPUT)
BROWN/BLACK UNLOCK #87A NORMALLY CLOSED
BLUE/BLACK UNLOCK #30 COMMON (OUTPUT)
VIOLET UNLOCK #87 NORMALLY OPEN (INPUT)
BLACK/WHITE DOMELIGHT SUPERVISION INPUT #87
TO H1/4
TRUNK
RELEASE
DOMELIGHT
SUPERVISION
LOCK
UNLOCK
TRIGGER WIRE IN CAR
#87
CUT
X
X
CUT
IIMMPPOORRTTAANNTT!!
The system must be programmed for 3.5 second door lock pulses.
17
type F: one-wire system
This system usually requires a negative pulse to unlock, and cutting the wire to lock the door. (With some
vehicles, these are reversed.) It is found in the late-model Nissan Sentra, some Nissan 240SX, and
Nissan 300ZX 1992-up. It is also found in some Mazda MPV's.
IIMMPPOORRTTAANNTT!!
Remember that the violet jumper between the #87 lock terminal and the #87
unlock terminal must be cut.
18
type G: positive (+) multiplex
The door lock switch or door key cylinder may contain either one or two resistors.
Single-Resistor Type
If one resistor is used in the door lock switch/key cylinder, the wire will pulse (+)12V in one direction
and less than (+)12V when operated in the opposite direction.
Two-Resistor Type
If two resistors are used in the factory door lock switch/key cylinder, the switch/key cylinder will read
less than (+)12V in both directions.
Determining the Proper Resistor Values
To determine the resistor values, the door lock switch/key cylinder must be isolated from the factory
door lock system. For testing, use a calibrated digital multimeter that is set to ohms.
1. Cut the output wire from the door lock switch/key cylinder in half.
2. Test with the meter from the switch side of the cut door lock switch/key cylinder wire to a reliable
constant (+)12V source. Some good constant (+)12V references are the power input source to the
door lock switch/key cylinder, the ignition switch power wire, or the (+) terminal of the battery.
3. Operate the door lock switch/key cylinder in both directions to determine the resistor values. If
the multimeter displays zero resistance in one direction, no resistor is needed for that direction.
4. Once the resistor value(s) is determined, refer to the wiring diagram for proper wiring.
IIMMPPOORRTTAANNTT!!
To ensure an accurate resistance reading, do not touch the resistor or leads
during testing.
19
type G door lock system wiring diagram:
20
type H: negative (-) multiplex
The system is most commonly found in 1999 and newer Grand Am and Alero models, in 2000 and
newer Impala and Monte Carlo models, and in Chrysler and Mazda models. The door lock switch or
door key cylinder may contain either one or two resistors.
Single-Resistor Type
If one resistor is used in the door lock switch/key cylinder, the wire will pulse ground in one direction
and resistance to ground when operated in the opposite direction.
Two-Resistor Type
If two resistors are used in the factory door lock switch/key cylinder, the door lock switch/key cylinder
will read resistance to ground in both directions.
Determining the Proper Resistor Values
To determine the resistor values, the door lock switch/key cylinder must be isolated from the factory
door lock system. For testing, use a calibrated digital multimeter that is set to ohms.
1. Cut the output wire from the door lock switch/key cylinder in half.
2. Test with the meter from the switch side of the cut door lock switch/key cylinder wire to a reliable
ground source. Some good ground references are the ground input source to the door lock
switch/key cylinder or battery ground.
3. Operate the door lock switch/key cylinder in both directions to determine the resistor values. If
the multimeter displays zero resistance in one direction, no resistor is needed for that direction.
4. Once the resistor value(s) is determined, refer to the wiring diagram for proper wiring.
IIMMPPOORRTTAANNTT!!
To ensure an accurate resistance reading, do not touch the resistor or leads
during testing.
21
type H door lock system wiring diagram:
peripheral plug-in harnesses
LED, 2-pin WHITE plug
The LED operates at (+) 2 volt DC and plugs into the two-pin WHITE port. Make sure the LED wires are
not shorted to ground as the LED will be damaged. Multiple LED’s can be used, but they must be wired
in series. The LED fits into a 9/32-inch mounting hole. Be sure to check for clearance prior to drilling
the mounting hole.
NNOOTTEE::
Never use a BLUE LED in combination with a RED LED.
DIA-41
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