firebug24 wrote:I contacted the tech at Motorola and he advised to contact the control on both red connections.
I'm using an Astron 35M power supply and still won't turn on !!!! I've tried holding the F2 button while powering the radio up but only get a brief message "ignition on"\.
Anyone got any other ideas .
thanks all
steve w

I only played with one of these radios about a year ago. can't remember if you need to put +12 volts on the ignition input on the accessory connector or not. It is pin 10. If you look at the back of the radio the pins on the accessory connector are starting from the top left: 20, 2, 4, 6, 8, 10, 12, 14, 16 and 18. So you would want the top row, 6th pin in from the left.
This comes from the installation manual # 6880309U11 which can be downloaded from the MOL site if you have a Motorola account.
Jim