POWER DOOR LOCK WIRING
GREEN:
(-)
LOCK / (+) UNLOCK
BLUE:
(-)
UNLOCK / (+) LOCK
COMMON DOOR LOCK TYPES: (SEE FOR DESCRIPTIONS)
Negative Trigger (-):
Many Imports, Late Model Ford & General Motors
Positive Trigger (+):
Many GM, Chrysler/Dodge/Plymouth models:
Reverse Polarity:
Many Ford/Lincoln/Mercury, Dodge/Chrysler/
Plymouth and some GM Fullsize Trucks
Single Wire Systems:
Late /Chrysler/Dodge/Plymouth models:
95-UP Stratus, Cirrus, Breeze, 96-UP Caravan
Voyager, Town & Country; 90-97 Ford Probe; Mazda
Semi Automatic:
Older Saab and Volvo, Isuzu, Hyundai
Electric Vacuum:
Many mid 1980’s through mid 1990’s European cars
NOTE: This door lock information is provided as a guide. Your vehicle may differ.
Negative Trigger (-):
Negative trigger door lock systems send a negative (Ground) pulse to existing factory relays to lock and unlock
the vehicle doors. Testing with a Volt/Ohm meter or Digital Volt/Ohm Meter (DVM): Attach the red lead to a
+12Volt constant power source. Use the Black lead as your testing probe and find the wires that cause the
meter to show +12.0 Volts when the lock and unlock buttons on the door panel are pressed. The Negative
lock/unlock outputs of this alarm system can be directly interfaced to the lock/unlock wires for most vehicles
with Negative type systems.
Positive Trigger (+):
Positive trigger door lock systems send a Positive (12V) pulse to existing factory relays to lock and unlock the
vehicle doors. Testing with a Volt/Ohm meter or Digital Volt/Ohm Meter (DVM): Attach the Black lead to
Chassis ground (Vehicle body metal). Use the Red lead as your testing probe and find the wire that causes
the meter to show +12 Volts when the lock button on the door panel is pressed.
Reverse Polarity:
Reverse Polarity systems use no relays, but instead the door lock/unlock motors are controlled directly from
the lock and unlock switches in the door. The lock and unlock wires rest at Negative Ground when not in use.
When the lock or unlock button is pressed, one of the circuits is “Lifted” and replaced with +12V causing a lock
or unlock to happen. Reverse Polarity system require external relays or a relay module.
Single Wire (Dual Voltage):
Dual voltage systems have lock/unlock switches that send varying amounts of Positive voltage OR Negative
ground current through resistors to SAME wire for both lock and unlock. When the vehicle’s Body Computer
Module (BCM) or door lock module senses different voltages on this wire, the system will either lock or unlock.
Single wire door lock systems require external relays or a relay module and resistors.
Semi Automatic:
Semi Automatic systems use a power lock control for all doors EXCEPT the Driver’s door. The only way to
control lock/unlock on this type of system is to lock or unlock the Driver’s door. There are also NO Lock/Unlock
buttons or switches present in this type of system. The only way to gain control of a Semi Automatic system is
to install a door lock Actuator (motor) in the Driver’s door. The Actuator will electronically control the drivers for
lock and unlock which will cause all doors to now lock and unlock with the alarm. Actuators are available from
Crimestopper [Part # CS-610S1]. Installing actuators can be difficult and time-consuming. (Varies from
vehicle to vehicle.)
Electric Vacuum Pump:
These systems use vacuum-operated mechanisms to lock/unlock the doors from a central pump usually
located in the trunk. This system can be controlled via the vacuum pump control wire and 2 relays. In some
cases, you can also control vacuum systems by adding and actuator to the driver’s door as in Semi-Automatic
Systems.
SEE DOORLOCK WIRING DIAGRAM – NEXT PAGE
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