PS-4660TW
Installation Guide
P. 25
Positive Systems:
Very similar to the negative system, except that the vehicle's clutch relay is trigger by
12 V, instead of a negative signal. In a Positive system, when the clutch is pressed; a
positive (12 V) signal is sent to the relay, the relay energizes, when the Key is turned to
the
START
position the 12 V from the start wire is allowed to pass through the relay and to
starter motor. One of the wires at the clutch will test as 12 V, this is the supply wire. The
relay's positive trigger wire will only show positive when the pedal is pressed (some
vehicle's also require the Ignition system to be powered). To confirm you have Positive
system, hot wire the positive trigger wire by jumping it to a 12 V source with your fused
test jumper. You should now be able to turn the key to the
START
position and engage the
start motor, without pressing in the clutch pedal. A relay is needed to send 12 V to the
trigger wire from the Remote Car Starter during start attempts.
Note on N/C systems:
There are different types of this system used by various vehicle manufactures, the following is used
to illustrate how these systems work in general.
Normally Closed (N/C) Systems:
In the previous two examples, the clutch was bypassed by engaging the clutch relay. In
an N/C system, a relay is also used to interrupt the starter wire. In order to bypass an
N/C Clutch, one must prevent the Clutch relay from engaging.
If the pedal is not pressed, when the Ignition Key is turned to the
START
position, the relay
energizes and interrupts the start wire. If the pedal is pressed, when the Ignition Key is
turned to the
START
position, the relay does not energize and the
START
signal reaches the
Starter Motor.
In an N/C system, the supply wire is connected to the trigger wire of the relay at rest
(Pedal not pressed). When the Pedal is pressed, the connection is broken between the
supply wire and the trigger wire of the relay (disengaging the relay). To verify that you
have a N/C system disconnect the clutch switch, and the vehicle should start without the
clutch pedal being pressed. When you test the trigger wire with your logic probe, the
trigger wire will test as 12 V or negative when the pedal is not pressed, it should read as
an open circuit ( or Float) when the pedal is pressed.
Please note:
Your probe may also show feed back from the other
end of the circuit. The Polarity of the Trigger wire
does not matter in this system: all you need to do in
order to bypass it is to use a relay to interrupt this
wire during remote starts.
Ignition-controlled Door Locks
This feature will
LOCK
all the Doors of the vehicle when the Brake Pedal is pressed while
the Ignition Key is in the
IGNITION ON (RUN)
position. The unit will
UNLOCK
all Doors when the
Ignition Key is turned back to the
OFF
position.
If
Ignition Lock Only
is selected, the system will only
LOCK
all Doors when the Brake
Pedal is pressed while the Ignition Key is in the
IGNITION ON (RUN)
position.
