Identifying The Door Lock System - Viper 600 ESP Installation Manual

H2/B BLACK/WHITE input to domelight supervision relay
This wire determines what the output polarity of H1/4 will be. If the door pin circuit is negative, connect to
chassis ground. If the it is positive, connect to a fused 12V source.
H2/C - H2/H 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. (Some vehicles require that an after-
market actuator be added to the driver's door to allow system control. See Type D Locks.)

identifying the door lock system

The easiest way to determine what 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. If no central locking
switch is found, the installation may require a door lock actuator.
NOTE: Always retest the wires in the kick panel to be 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: 3-wire (+) pulse controlling factory lock relays
Most GM, some Ford and Chrysler, 1995 Saturn, some new VW, newer BMW.
type B: 3-wire (-) pulse controlling factory lock relays
Most Asian vehicles, early Saturn, some BMW and Porsche.
type C: directly-wired reversing-polarity switches
The switches 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.
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.
© 1999 Directed Electronics, Inc. Vista, CA
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