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this vehicle. The information concerning the Mechanical Neutral Safety Switch provided below will help
you to determine if the vehicle you are working on has this type of safety switch and will provide alternate
wiring methods to accommodate this situation.
CAUTION!
REMEMBER TO RECONNECT THE BROWN/BLACK WIRE TEMPORARILY
DISCONNECTED IN STEP 3
DO NOT RELEASE THIS VEHICLE TO THE CONSUMER UNTIL YOU CONFIRM THE OPERATION OF THE NEUTRAL
SAFETY START FEATURE.
MECHANICAL NEUTRAL SAFETY SWITCH CONSIDERATIONS:
Mechanical neutral safety switch configurations differ slightly in that they do not offer the same level of safety when
installing a remote start device. Often when the ignition switch is turned off while the gear selector is in any position
other than park or neutral, the mechanical function will not allow the key to be turned to the start position or be
removed from the ignition cylinder. This configuration prevents mechanical operation while the vehicle is in gear but
offers no consideration for electrical operation. Because of this potential problem, this installation requires the
additional connection of a safety wire from the remote start device to the vehicle Park/Neutral ECM Input or the
vehicle key in sensor. This connection will prevent remote start operation if the key is left in the ignition switch
regardless of the gear selectors position.
PARK / NEUTRAL ECM INPUT:
The Park / Neutral ECM input is the preferred method of installation. This not only maintains the integrity of the
factory circuit, it is also the easiest to install, providing the vehicle you are working on has this ECM input.
The installation required for this application (shown below), indicates the slight reconfiguration of the control switch
wiring and the addition of a 4000 series diode. Shown is a typical GM Park/Neutral ECM 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 reconfigured to allow a
margin of safety and will prevent the vehicle with a Mechanical Neutral Start Switch from starting in gear.
WE ADVISES THAT YOU MAINTAIN THE FACTORY CIRCUIT WHENEVER POSSIBLE. The following two