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Type H: Negative (-) multiplex
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.
GREEN
BLUE
Single-Resistor Type
If one resistor is used in the door lock switch/key cylinder, the wire will pulse
ground in one direction and resistance to ground when operated in the opposite
direction.
Two-Resistor Type
If two resistors are used in the factory door lock switch/key cylinder, the door
lock switch/key cylinder will read resistance to ground in both directions.
To determine the resistor values, refer to the steps on page 43.
42
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