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General Motors VATS By-Pass Diagram
DARK GREEN Wire: Tach Sensor Input
This wire will continually monitor the engine tach rate while the unit is under power of the Remote Start module. This
wire will be routed to the vehicle ECM tach input or through the firewall into the engine compartment and connect to
the negative side of the ignition coil. This Remote Start unit learns the tach rate of the vehicle and in most cases will
operate properly from one multi coil pack regardless of the number of cylinders. If the vehicle has a single coil unit for
each cylinder, it may be necessary to connect this wire to more than one cylinder for proper tach reference. See multi
coil wiring detail shown later in this manual for additional information.
Tachometer Input Wiring Detail
2 Pin Door Lock/Unlock Harness: (White Connector)
The Red & Green Door Lock/Unlock output wires provide either a pulsed ground or pulsed + 12 volts to control the
vehicle door lock / unlock circuits. The output of these wires has a maximum switching capability of 300mA. Many
vehicles today have factory door lock relays which can be connected directly to these outputs, however always confirm
that the factory relays in your particular vehicle do not exceed the rated 300mA output of the units door lock/unlock
circuit. Plug the 2 pin connector of the door lock/unlock harness into the mating connector shell of the control module.
Determine the door lock circuit of the vehicle you are working on and wire according to the diagrams shown.
3 Wire Ground Switched Door Lock Circuits:
In this application, the Red wire of the 2 pin harness provides a ground pulse during the arming sequence, or pulsed
ground lock output. Connect the Red wire to the low current ground signal wire from the factory door lock switch to the
factory door lock relay.
The Green wire of the 2 pin harness provides a ground pulse during the disarming sequence, or pulsed ground
unlock output. Connect the Green wire to the low current ground signal wire from the factory door unlock switch to the
factory door unlock relay. See Below For Wiring Detail.
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