August, 2005
RS2
14
wiring. Shown is a typical GM Park/Neutral ECM input circuit. To connect the 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 Remote Start Unit in.
2. Connect the BLACK/WHITE Neutral Safety Switch wire (H3/2) to this reference wire.
NOTE: If the optional remote starts enable toggle switch is installed, connect the one side the enable switch to this
reference wire and connect the other side of the enable switch to the BLACK/WHITE Neutral Safety Switch wire (H3/2) 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.
Ignition
P
1
2
D
N
R
Electronic Control Module (ECM)
Solid State, Do Not Measure
Resistance
To Neutral Safety
Switch Input wire
Black/White
(
H3/2
)
Optional Enable Switch
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 ADVISE 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.
Method 2 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, the original factory key in chime module will not
alert the owner that the key has been left in the ignition switch. In addition, this may also affect other warning tones such
as the light ‘on’ reminder.
These situations should be carefully considered before altering the vehicle’s wiring and must be fully explained to the
consumer.
METHOD 1
+ 12 V
Ignition Key In Sensor
Switch Closes with Key In
Ignition Cylinder
Switch
Drivers Door Pin Switch
87a
86
30
87
85
Key In
Chime Module
Connected to (-) Negative
Safety Input Wire
White/ Black
(
H3/4
)
To Hood Pin Switch Safety
Shut Down (
H3/4
)
1N4003
+ 12V
To connect to the key in sensor as shown in method 1:
A. Locate the control wire that connects the driver’s door pin switch to the key in sensor switch.
B. Cut this wire and connect the ignition cylinder side to chassis ground.
C. Locate the key in sensor switch wire that connects the chime module to the ignition cylinder.
D. Cut this wire and connect the ignition cylinder side to terminal 30 of a P&B VF45F11 or equivalent relay.
E. Connect the cathode (striped) side of a 4003 series diode to this same wire, and connect the (non striped) side to the
negative safely input wire (WHITE/ BLACK) (H3/4) of the Remote Start Unit.
F. Connect terminal 86 of the relay to a fused + 12 volt constant battery source.
G. Connect terminal 87 of the relay to the Chime Module side of the previously cut wire in step D.
