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3 Wire Ground Switched 2 Step Door Locks
In this application, the red wire provides a ground pulse during locking, or the pulsed ground lock output.
Connect the red wire to the wire that provides a low current ground signal from the factory door lock switch
to the factory door lock control relay.
The green wire provides the first ground pulse during unlocking, or the drivers door pulsed ground
unlock output. Connect this wire to the drivers door unlock relay that requires a low current ground
signal to unlock only the drivers door. If the vehicle does not have a separate drivers door relay, one will
have to be added. Locate the drivers door unlock motor wire and cut it at a convenient location to allow
wiring of an optional relay. Connect the door side of the cut wire to terminal 30 of the optional relay added.
Connect the vehicle side of the cut wire to terminal 87a of the optional relay added. Connect the green wire
of the 3 pin harness to terminal 86 of the optional relay added. Connect terminal 85 of the optional relay
added to a fused constant + 12 volt source. Most vehicles door lock/unlock motor legs rest at ground, and
switch +12 volts to the door lock/unlock motor legs for operation, if this is the case in the vehicle you are
working on, connect the remaining terminal, 87, to a fused + 12 volt source. In the rare instance that the
vehicle door lock/unlock motor legs rest at + 12 volts and switches ground to the door lock/unlock motors,
connect the remaining terminal, 87, to chassis ground.
The Red/Black wire provides a pulse ground output when the unlock button of the transmitter is pressed
a second time after unlocking. Connect the Red/Black wire to the wire that provides a low current ground
signal from the factory door unlock switch to the factory door unlock control relay.
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3 Wire Ground Switched Door Lock/Unlock Wiring Detail