T T W W O O - - R R E E S S I I S S T T O O R R T T Y Y P P E E : : 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.
D D E E T T E E R R M M I I N N I I N N G G T T H H E E P P R R O O P P E E R R R R E E S S I I S S T T O O R R V V A A L L U U E E S S : : 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.
note: To ensure an accurate resistance reading, do not
touch the resistor or leads during testing.
note: Please refer to the Door Locking Systems document
on w w w w w w . . d d e e s s i i g g n n t t e e c c h h - - i i n n t t l l . . c c o o m m (On-Line Tech Support,
Tech Tips) for complete resistor test procedure and addi-
tional information for multiplexed door locks.
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 ground source. Some good
ground references are the ground input source to the door lock
switch/key cylinder or the battery ground.
3.
Operate the door lock switch/key cylinder in both directions to
determine the resistor values. If the multimeter displays zero resis-
tance in one direction, no resistor is needed for that direction.
4.
Once the resistor value(s) is determined, refer to the wiring dia-
gram for proper wiring.
© 2006 Directed Electronics
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