There are 8 different types of door lock systems (Type A - H). Please search the vehicle specific wiring
instructions online and the chart below to help determine which door lock system your vehicle uses. Most
vehicle factory door lock wires is smaller gauge and located in the driver’s kick panel or under the driver’s
dash.
Note: The most common type of door lock systems are Type A positive trigger, Type B negative trigger
and Type C reverse Polarity.
Type G: Positive (+) multiplex. One wire controls lock and unlock using resistor(s).
Type A: Positive trigger with three-wire (+) pulse controlling factory lock relays.
Type B: Negative trigger with three-wire (-) pulse controlling factory lock relays.
Type C: Reverse polarity, positive triggered
Type D: Adding one or more aftermarket actuators. These include central locking systems without an
actuator in the driver’s door, but with factory actuators in all the other doors. Type D also includes
vehicles without power locks, which will have actuators added.
Type E: Electrically-activated vacuum systems. The vehicle must have a vacuum actuator in each door.
Making 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 wire harness.
Type F: One-wire system: cut to lock, ground to unlock.
Type H: Negative (-) multiplex. Same as Type G system, but uses (-) pulse instead.
The alarm default setting is type B negative (-) for locking and unlocking, if your car is with type B
negative central door locking, you can connect the white/black locking wire and white unlocking wire from
EC003 with your car locking and unlocking wire directly, or follow with the Type B negative trigger as
below diagram shows to connect with the car central door locking system.
Central door locking installation
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EC003 Wiring diagram
If your car trunk is positive (+),
refer to below wiring method:
Please add an extra SPST relay if
you connect red/black trunk
release(-300mA) wire with your
trunk motor.
12V+
red/
black wire
Trunk motor(+)
12V+
Chassis ground
black wire
red/
Trunk motor(-)
12V+
If your car trunk is negative (-),
refer to below wiring method:
red/black trunk release (-300mA)
IMPORTANT TIPS:
1.Connect the black chassis ground wire first when making wire
connection to avoid damage on the device.
2.Once you finish all wire connection, test the function first and
remember to use the electrical tapes or strips to tighten all the wire
connection to avoid any poor connection between the control
module & wire harness.
