On/Off Toggle Switch
Select a place on the dash or console that is easily accessible and easily visible so that the status indicator
light on the switch may be seen.
Door Latch Actuator
Remove the door panel and locate the door latch. Select a mounting location that will allow the actuator to
push or pull in a straight line. If the actuator movement is not straight (linear) the actuator will bind and
fail. Many newer SUV’s and standard vehicles have changed the latch designs, making them more
difficult to open electrically. Often you will need a mechanical advantage to open the door such as a lever
or external spring. See diagrams on page 8.
Gas Strut
Check the floor and the exposed door frame to locate a suitable location to install the special door and floor
bracket. The surface must be strong, stable and should NOT flex. The strut must be mounted so that the
hydraulic fluid inside will lubricate the piston. See diagrams on page 9.
Factory Door Lock
Vehicle door lock circuits are factory designed as positive pulse, negative pulse or reversal rest @
ground circuits. Determine which type of door lock circuit is used in your vehicle.
Positive Pulse System:
The switch has 3 wires. The input terminal, usually the center terminal, is +12v.
When the switch knob is pressed (momentarily On) one of the other terminals is also +12v. This means that
the switch is sending a +12v (positive pulse) signal to lock or unlock the door. There is a special relay in this
circuit which handles the ‘reversal rest @ ground’ circuit required for most motor operations. Most GM
vehicles use a Positive Pulse circuit for door locks. Check the number of wires on the switch and check the
input wire to the switch. It should be a +12v signal. See diagram pg 13.
Negative Pulse System:
The switch has 3 wires. The input terminal, usually the center terminal, is ground.
When the switch knob is pressed (momentarily On) one of the other terminals is also ground. This means that
the switch is sending a ground (negative pulse) signal to lock or unlock the door. There is a special relay in
this circuit which handles the ‘reversal rest @ ground’ circuit required for most motor operations. Most
foreign cars use a Negative Pulse circuit for the door locks. Check the number of wires on the switch and
check the input wire to the switch. It should be a ground signal. See diagram pg 13.
Reversal Rest @ Ground System:
This switch usually has 5 wires (sometimes 4 wires). All of the wires and
terminals rest @ ‘ground’ when the switch is not activated. One terminal b12v (positive) only when
the switch is activated. The switch sends a positive signal through the system and turns on the motor. The
ground signal from the motor passes through the other side of the switch and goes to a chassis ground. There
is no special relay in this circuit because the switches are hard-wired to handle the high current of the ‘reversal
rest @ ground’ circuit required for most motor operations. Most Ford vehicles and most Chrysler vehicles
use a Reversal Rest @ Ground circuit for door locks. Check the number of wires on the switch. If there are 4
or 5 wires, then the circuit is probably a reversal rest @ ground circuit. See diagram pg13
To determine which type is used in your vehicle, take a voltmeter and probe one of the output wires at the
switch. Check the polarity with the switch pressed and without the switch pressed. Compare results with
the chart below.
Page -7-
K9 Partner Power Door Opener System with PowerTouch Remote Control
Manual C840.N2
Installation: Planning, Continued
Door Lock Switch
Positive Pulse
Negative Pulse
Reversal Rest@Ground
Switch NOT Pressed
No Voltage / Floats
No Voltage / Floats
Ground
Switch Pressed
+12 Volts
Ground
+12 Volts
Typical # of Wires
3 Wires
3 Wires
5 Wires
Current
1 amp
1 amp
20 amps
Output Terminals
3 of Terminals
