separate circuits an optional prewired dual relay socket and relays is recommended. Note:
If a security system is present which utilizes a starter interrupt circuit, the Green wire
connection must be on the Starter side of the interrupt, not the Ignition Switch side.
Yellow Wire: Connection Required
Connect this wire to the vehicle's Ignition #2 wire. This circuit, known as Secondary
Ignition, varies in its function. In some vehicles, it is required to allow the engine to run,
while in others, it supplies the Heat, Ventilation and Air Conditioning (HVAC) system.
This output's operation is identical to the Blue wire Ignition #1's operation. The connec-
tion point for this wire is also found in the ignition switch wiring harness.
One of the primary reasons for adding a Remote Car Starter is to allow the vehicle to
warm up in winter or cool down in summer. The Heating, Ventilation and Air Condi-
tioning (HVAC) circuit varies from car to car in its operation. Usually, the Yellow
Ignition #2 is connected to this circuit. Some vehicles, however, will require the HVAC
circuit to be connected to the White Accessory wire. Once identified, test the wire pow-
ering the HVAC circuit; if it has Positive 12 Volts while starting, use the Yellow wire. If
Positive 12 Volts is not present while starting, use the White wire.
The Yellow wire must be connected; if there is no use for this wire, connect to the
Ignition #1 circuit along with the Blue wire. If the White wire is needed to power the
HVAC circuit, the Yellow wire may be used instead to turn on the vehicle's exterior
lights, but always connect it to the parking lights only and not the headlights.
Page - 12
"poles"), which are physically connected together (indicated by the dotted line connecting
them) and move in unison with the ignition key. In this schematic, the ignition switch is in
the "Run" position. The first item of interest is the fact that even though two Constant 12
Volt wires are present, they are one circuit (fused at the source). Now note which circuits
are connected in the different switch positions (Remember: they move in unison). "Bat 1"
and "Bat 2" are connected to nothing in the "Off" and "Lock" positions. In the "Acces-
sory" position, "Bat 1" is connected to the "Accessory & HVAC" circuit. In "Run" posi-
tion, "Bat 1" is connected to the "Ignition" circuit while "Bat 2" is connected to the "Acces-
sory & HVAC" circuit. In the "Start" switch position, "Bat 1" keeps the "Ignition" circuit
energized while "Bat 2" powers the "Starter" circuit. Also notice the efficiency of this
switch - its configuration allows the "Bat 1" and "Bat 2" circuits to evenly share the elec-
trical load among the different ignition switch positions.
Page - 29
Start
Run
Lock
Acc.
Off
Bat 1 Bat 2
Battery
40 Amp
Ignition- Coil
and Fuel Pump
Starter
Accessory &
HVAC System
Basic Ignition Switch Schematic.
Continued Next Page
separate circuits an optional prewired dual relay socket and relays is recommended. Note:
If a security system is present which utilizes a starter interrupt circuit, the Green wire
connection must be on the Starter side of the interrupt, not the Ignition Switch side.
Yellow Wire: Connection Required
Connect this wire to the vehicle's Ignition #2 wire. This circuit, known as Secondary
Ignition, varies in its function. In some vehicles, it is required to allow the engine to run,
while in others, it supplies the Heat, Ventilation and Air Conditioning (HVAC) system.
This output's operation is identical to the Blue wire Ignition #1's operation. The connec-
tion point for this wire is also found in the ignition switch wiring harness.
One of the primary reasons for adding a Remote Car Starter is to allow the vehicle to
warm up in winter or cool down in summer. The Heating, Ventilation and Air Condi-
tioning (HVAC) circuit varies from car to car in its operation. Usually, the Yellow
Ignition #2 is connected to this circuit. Some vehicles, however, will require the HVAC
circuit to be connected to the White Accessory wire. Once identified, test the wire pow-
ering the HVAC circuit; if it has Positive 12 Volts while starting, use the Yellow wire. If
Positive 12 Volts is not present while starting, use the White wire.
The Yellow wire must be connected; if there is no use for this wire, connect to the
Ignition #1 circuit along with the Blue wire. If the White wire is needed to power the
HVAC circuit, the Yellow wire may be used instead to turn on the vehicle's exterior
lights, but always connect it to the parking lights only and not the headlights.
Page - 12
"poles"), which are physically connected together (indicated by the dotted line connecting
them) and move in unison with the ignition key. In this schematic, the ignition switch is in
the "Run" position. The first item of interest is the fact that even though two Constant 12
Volt wires are present, they are one circuit (fused at the source). Now note which circuits
are connected in the different switch positions (Remember: they move in unison). "Bat 1"
and "Bat 2" are connected to nothing in the "Off" and "Lock" positions. In the "Acces-
sory" position, "Bat 1" is connected to the "Accessory & HVAC" circuit. In "Run" posi-
tion, "Bat 1" is connected to the "Ignition" circuit while "Bat 2" is connected to the "Acces-
sory & HVAC" circuit. In the "Start" switch position, "Bat 1" keeps the "Ignition" circuit
energized while "Bat 2" powers the "Starter" circuit. Also notice the efficiency of this
switch - its configuration allows the "Bat 1" and "Bat 2" circuits to evenly share the elec-
trical load among the different ignition switch positions.
Page - 29
Start
Run
Lock
Acc.
Off
Bat 1 Bat 2
Battery
40 Amp
Ignition- Coil
and Fuel Pump
Starter
Accessory &
HVAC System
Basic Ignition Switch Schematic.
Continued Next Page
