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© 2 0 0 7 D i r e c t e d E l e c t r o n i c s
Type G: Positive (+) multiplex
This system is sometimes found in Ford, Mazda, Chrysler, and GM
vehicles. The door lock switch or door key cylinder may contain
either one or two resistors. When interfacing with this type of
door lock system, two relays or a DEI 451M must be used.
Single-Resistor Type
If one resistor is used in the door lock switch/key cylinder, the
wire will pulse (+)12 volt in one direction and less than (+)12 volt
when operated in the opposite direction.
Two-Resistor Type
If two resistors are used in the factory door lock switch/key cylin-
der, the switch/key cylinder will read less than (+)12 volt in both
directions.
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