>What did you test...? With mine the problem is there is a small metal pad at the
>back of the power connector that the base of the connector should touch
>against when there is no plug inserted... This allows the empeg to detect when
>the plug is not inserted and therefore when it is in the car.

Yes I can see the switching mechanismn in the power connector. I proofed the switch with a measuring instrument, it's ok.
I think after this switch the control signal is converted (maybe a transistor) somehow before it's going into a microchip, isn't it? The problem must be somewhere at this point.
If a plug is in I measure a voltage of 3.3V at the control signal of the power connector, if the power is coming from the docking cage, the voltage there is 0V. (As expected)
Now I don't see to which component this signal is going. On witch pin can I further do a measurement?

Thanks anyway