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© 2006 directed electronics.
the switch wires to be used, you can usually simplify the instal-
lation by locating the same wires in the vehicle’s kick panel. If no
central locking switch is found, the installation may require a
door lock actuator.
There are eight common types of door lock circuits (some vehi-
cles use more unusual systems):
■
TTyyppee AA::
Three-wire (+) pulse controlling factory lock relays.
Most GM, some Ford and Chrysler, 1995 Saturn, some new
VW, newer BMW.
■
TTyyppee BB::
Three-wire (-) pulse controlling factory lock relays.
Most Asian vehicles, early Saturn, some BMW and Porsche.
■
TTyyppee CC::
Direct-wired reversing-polarity switches. The switch-
es are wired directly to the motors. This type of system has no
factory relays. Most Fords, many GM two-doors cars and trucks,
many Chryslers.
■
TTyyppee DD::
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 will have actuators
added. All Saabs before 1994, all Volvo except 850i, all pre-1997
Subarus, most Isuzus, and many Mazdas. Some mid-eighties
Nissans, pre-1985 Mercedes-Benz and Audi.
■
TTyyppee EE::
Electrically-activated vacuum systems. The vehicle
must have a vacuum actuator in each door. Make sure that lock-
note: Always retest the wires in the kick panel to be sure
they function the same way as the wires on the switch.
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