
This is the view of the back of the DVD player of a 2008 Land Cruiser 200 Series after you've taken care getting access to it.
The Yellow wire going to the red crimp terminal is the handbrake wire which is earthed from the DVD side.
The short Violet wire to the right is the vehicle speed sensor, which is cut.
For future modles, the process will be the same for finding these wires. The hand brake will have an earth signal when it is up, and it
will be open circuit when the hand brake goes down.
The vehicle speed sensor will create a negative pulse when the vehicle is moving.
Both conditions can be found easily with a LED circuit tester that is hooked to the battery, this will allow you to test circuits without
putting any load on them, or switching the earth through the test light. Do not induce power or earths with these testers unless you know
what the circuit is supposed to do as you may damage equipment.