stuck my voltmeter where it wasn't welcome

[tranceatlantic]

Thanks for all the help guys. I try to be careful and I was using a meter because I know they don't draw current from the wire you are testing. For that reason I also didnt think a lamp would have been better but an LED version would draw very little current. I had the ground side of the meter held at a ground point so I really dont know what happened. Thats where the Guinness comes in.

To answer some of the questions........

I have a cheap little digital meter from radio shack - nothing fancy

The motor is not currently supercharged but thats the direction Im heading. Im trying to get the controls and extra diagnostic stuff in place first. I realise Im going to have to look at how much current each component needs. Sounds like a wire from the DME bus is the easy solution (Meir suggested black/brown at pin 56) but pulling too much current from the is scary.