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METHOD 1
input circuit. To connect the Audiovox remote start unit to the GM Park / Neutral ECM input:
1. Locate the Orange / Black reference wire in the" C2" connector found at the ECM in GM B Body
vehicles or, locate the equivalent reference wire in the vehicle you are installing the Audiovox
Remote Start Unit in.
2. Connect the Cathode, (Striped) end, of a 4000 series diode to this reference wire.
3. Connect the Anode, (Non Striped) end, of the diode to one side of the Remote Starts enable switch.
4. Connect the other side of the enable switch to the Black/White enable input wire of the Remote Start
unit.
The reference diagram below shows a typical GM B Body ECM reference wire and how it is to be
connected to the Remote Start Unit.
KEY IN SENSOR CIRCUITS:
If the vehicle you are working on does not have or you cannot locate the ECM reference wire, there are
two alternatives available. Although not preferred, the vehicle Key In Sensor may be re-configured to
allow a margin of safety and will prevent the vehicle with a Mechanical Neutral Start Switch from starting
in gear.
AUDIOVOX ADVISES THAT YOU MAINTAIN THE FACTORY CIRCUIT WHENEVER POSSIBLE. The
following two circuits may be used only if the above circuit is not available.
NOTE: When completing an installation using either of the following key in sensor circuits, if the operator
inserts the ignition key while the vehicle is running under the control of the Remote Start, the
vehicle will shut down. This must be explained to the operator as it is in contrast to the normal
operation of a vehicle utilizing an electrical neutral start switch and is inconsistent with the
operators manual.
Additional information concerning Key In Sensor methods 1 & 2 are listed below and should be reviewed
before considering either alternative.
Method 1 will allow the safety required for the remote start unit and prevent the vehicle from starting
while in any gear other than Park or Neutral while the key is in the ignition cylinder however, if the key is
left in the ignition switch and the door is left opened, the added relay will be energized causing a 150mA
drain on the battery.