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© 2001 Directed Electronics, Inc. Vista, CA
TYPE G: (+) MULTIPLEX SYSTEM
This system is most commonly found in Ford, Mazda, Chrysler and GM vehicles. The door lock switch or door key
cylinder may contain either one or two resistors.
TYPE H: (-) MULTIPLEX SYSTEM
The system is most commonly found in Ford, Mazda, Chrysler and GM vehicles. The door lock switch or door key
cylinder may contain either one or two resistors.
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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.
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Many BMW’s and VW’s have no external switch. The switches are inside the actuator, and instead of pulsing,
the proper wires will switch back and forth from (+)12V to (-) ground as the door locks are operated.
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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.
IMPORTANT!
The H2/A and H2/B wires are not required for wiring the door locks. For detailed
wiring instructions for these two wires, refer to the beginning of the Door Lock Harness (H2) Wire
Connection Guide section. Depending on the type of door lock system, there may be additional H2
harness wires that are not used for wiring the door locks.
type A: positive-triggered, relay-driven systems
at the switch
