Type G: Positive (+) Multiplex - Clifford IntelliGuard 850 Installation Manual

type G: positive (+) multiplex

single-resistor type
If one resistor is used in the door lock switch/key cylinder, the wire will pulse (+)12V
in one direction and less than (+)12V when operated in the opposite direction.
two-resistor type
If two resistors are used in the factory door lock switch/key cylinder, the switch/key
cylinder will read less than (+)12V in both directions.
determining the proper resistor values
To determine the resistor values, the door lock switch/key cylinder must be isolated
from the factory door lock system. For testing, use a calibrated digital multimeter that
is set to ohms.
I I M M P P O O R R T T A A N N T T ! ! To ensure an accurate resistance reading, do not touch the resistor or
leads during testing.
1. Cut the output wire from the door lock switch/key cylinder in half.
2. Test with the meter from the switch side of the cut door lock switch/key cylinder
wire to a reliable constant (+)12V source. Some good constant (+)12V refer-
ences are the power input source to the door lock switch/key cylinder, the igni-
tion switch power wire, or the (+) terminal of the battery.
3. Operate the door lock switch/key cylinder in both directions to determine the
resistor values. If the multimeter displays zero resistance in one direction, no
resistor is needed for that direction.
4. Once the resistor value(s) is determined, refer to the wiring diagram for proper wiring.
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