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type C: reversing polarity system
Use these instructions if the power door lock switch has four or five heavy-gauge
wires. This type of switch has two outputs that rest at (-) ground.
I I M M P P O O R R T T A A N N T T ! ! To interface with these systems, you must cut two switch leads. The relays
must duplicate the factory door lock switches' operation. The master switch will have
one or two ground inputs, one (+)12V input, and two switch outputs going directly to
the slave switch and through to the motors. These outputs rest at (-) ground. The lock or
unlock wire is switched to (+)12V, while the other wire is still grounded, thus complet-
ing the circuit and powering the motor. This will disconnect the switch from the motor
before supplying the motor with (+)12V, avoiding sending (+)12V directly to (-) ground.
It is critical to identify the proper wires and locate the master switch to interface prop-
erly. Locate wires that show voltage when the switch is moved to the lock or unlock
position. Cut one of the suspect wires and check operation of the locks from both
switches. If one switch loses all operation in both directions then you have cut one of
the correct wires and the switch that is entirely dead is the master switch. If both
switches still operate in any way and one or more door motors have stopped respond-
ing entirely, you have cut a motor lead. Reconnect it and continue to test for another
wire. Once both wires have been located and the master switch identified, cut both
wires and interface as described in the following paragraphs.
W
W A A R R N N I I N N G G ! ! If these wires are not connected properly, you will send (+)12V directly
to (-) ground, possibly damaging the alarm or the factory switch.
H2/1 WHITE/BLACK: Once both door lock wires are located and cut, connect
the white/black wire to the master switch side of the lock wire. The master switch
side will show (+)12V when the master switch is operated to the lock position
and (-) ground when the master switch is in the middle position.
H2/2 GREEN/BLACK: Connect the green/black wire to the motor side of the
lock wire.
H2/3 VIOLET/BLACK: This wire must be connected to a constant (+)12 volts. The
best connection point for this wire is the constant (+)12V supply for the door lock
switch or directly to the positive (+) battery post with a fuse at the battery post.
H2/4 VIOLET: This wire must be connected to a constant (+)12 volts. The best
connection point for this wire is the constant (+)12V supply for the door lock
switch or directly to the positive (+) battery post with a fuse at the battery post.
N N O O T T E E : : Most direct-wired power lock systems require 20-30 amps of current to oper-
ate. Connecting the violet/black wire to a poor source of voltage will keep the door
locks from operating properly.
14
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