Hi Cupra R
Mt dealer came up trumps and I was able to take my multimeter to him and measure the voltages.
Both the 12 volt connections are required.
I used car speaker connections to push onto the spades in the connector on the loom.
I have used a fused switch power supply to both the red and purple wires and find it satisfactory.
It is possible to add files to the tomtom device to enable it to turn on and off with the ignition switch.
John
Mt dealer came up trumps and I was able to take my multimeter to him and measure the voltages.
Both the 12 volt connections are required.
I used car speaker connections to push onto the spades in the connector on the loom.
I have used a fused switch power supply to both the red and purple wires and find it satisfactory.
It is possible to add files to the tomtom device to enable it to turn on and off with the ignition switch.
John