Testing Reversing Polarity Systems - Avital 2000 Operation Manual

testing reversing polarity systems

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.
IMPORTANT! To interface with these systems, you must cut two switch leads. The relays must dupli-
cate 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 completing the circuit and powering the motor. This will discon-
nect 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 properly. 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 responding 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.
WARNING! If these wires are not connected properly, you will send (+)12V directly to (-) ground,
possibly damaging the system or the factory switch.
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© 2001 Directed Electronics, Inc. Vista, CA