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© 2006 Directed Electronics
must have a vacuum actuator in each door. Make sure that lock-
ing 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 harness. Mercedes-Benz and Audi
1985 and newer.
■
TTyyppee FF::
One-wire system - cut to lock, ground to unlock. This
system is found in late-model Nissan Sentras, some Nissan
240SX, and Nissan 300ZX 1992 and later. It is also found in
older Mitsubishis, and some early Mazda MPV’s.
■
TTyyppee GG::
Positive (+) multiplex. This system is most common-
ly found in Ford, Mazda, Chrysler and GM vehicles. The door
lock switch or door key cylinder may contain either one or two
resistors.
■
TTyyppee HH::
Negative (-) multiplex. The system is most common-
ly found in Ford, Mazda, Chrysler and GM vehicles. The door
lock switch or door key cylinder may contain either one or two
resistors.
at the door lock switch
■ 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.
■ Many BMW’s and VW’s have no external switch. The switch-
es are inside the actuator, and instead of pulsing, the proper
wires will flip-flop from (+)12V to (-) ground as the door locks
are operated.
■ Direct-wired switches will have a (+)12V constant input and one
or two (-) ground inputs, along with two output leads going