14
Wiring
(continued)
HC4: Black 7 Pin Accessory Harness
(continued)
The Black/White wire is a safety input wire. The remote start unit will not activate unless this wire is grounded.
When this wire is disconnected from ground, the remote start system is disabled.
1. The primary connection point for the Black/White wire is at the Neutral Safety Switch located on/at the transmission
shifting lever. The switch output must be GROUNDED when the shifter lever is in the PARK position.
2. The second best connection point for the Black/White wire is at the Parking Brake Switch output wire. Make
sure that when the parking brake is engaged that the output wire of the switch is grounded.
3. An optional remote start toggle switch can be added to temporarily disable the Remote Start Device. It can
prevent the vehicle from being remote started accidentally. This feature is useful if the vehicle is being
serviced or stored in an enclosed area. To disable the remote start, move the optional remote start enable
toggle switch to the OFF position. To enable the remote start, move the optional remote start enable toggle
switch to the ON position.
Note: When the Black/White wire is not used for it’s intended safety purpose, connect the
Black/White wire to the “Ground” or remote start system will not function.
This input provides the remote start system with information about the engine’s revolutions per minute (RPM).
It can be connected to the negative side of the coil in vehicle with conventional coils.
In multi-coil ignition system, the system can have individual coil wires. Individual coil wires in a multi-coil
ignition system will register lower amounts of AC voltage. Common locations for a tachometer wire are the
ignition coil itself, the back of the gauges, engine computers, and automatic transmission computers.
Note: This wire requires programming (See “Remote Start Feature Programming” for the proper programming
procedure).
Important! Do not test tachometer wires with a test light or logic probe. Electronic
components of the ignition system will be damaged. You must us a Digital Multi-meter.
Note: If you use the voltage or timer checking method for remote start detection, this wire does not need to be
connected.
How to find a tachometer wire with your multi-meter:
1. Set the meter to read ACV or AC voltage (12 or 20V).
2. Attach the (-) probe of the meter to chassis ground.
3. Start the vehicle’s engine.
4. Probe the wire you suspect of being the tachometer wire with the red probe (+) of the meter.
5. If the probed wire is the correct wire, the meter will read between 1V and 6V at idle and will increase with RPM.
Black/White Wire
Neutral Safety Switch Input
P
R
N
2
1
Optional Enable Switch
Ignition
Electronic Control Module (ECM)
Solid State,
Do Not Measure Resistance
Black 7-Pin
Mini Connector
Black/White Wire: (-) Neutral Safety Switch Input
Violet Wire: (-) Tachometer Signal Connection
