I recently had the opportunity to install a traction control memory module in a 2006 G35 coupe (thank you to LSHatch).
The install was a snap, still by far the easiest KPtech module to install.
There are only three wires, switched power, ground, and VDC switch signal.
On top of that, there is only one screw to remove to remove the lower dash. The screw is located in the bottom left corner of the panel.
Once the screw is removed gently pull on the lower dash and it will unsnap. There is a hose and a wire harness to disconnect on the right hand side, and three harnesses to unclip on the left hand side of the panel.
The hood release is connected to this panel also, but it is NOT necessary to remove/unhook it. With the other things disconnected you should be able to lay the panel on the floor board and continue with it there.
One of the harnesses that was disconnected from the left side of the panel was the VDC switch harness. In this harness you will find a black wire and a red/white wire.
The black wire connects to the black (ground) wire on the KPtech module. The red/white wire connects to the KPtech orange wire (Switch In/Out). I chose to solder and tape these connections, and that is still the preferred and recomended way of making the connections. The red/white wire will read 5vdc under normal circumstances and 0vdc when the VDC button is pushed.
To find the final wire you need to dig in the big harness that runs above the drivers kick panel. This harness is wrapped with a vinyl type material that can be 'unpeeled'. Inside the harness you will find a white/blue wire that only reads 12vdc when the ignition is turned on. Connect the yellow (IGN) wire of the KPtech module to this wire and you're done!
The module was tucked up inside the dash and the included wire ties were used to secure it.