In my 28 volt plane the cigar lighter jack was wired in series with a low
ohmage power resistor. This was undoubtedly to allow the use of a standard
car-type 12 volt heater element in the lighter. With a GPS plugged into the
jack, I got 28 volts.

"BT" wrote in message
...
Is the 24Volt system stepped down to 12Volt for the Cig lighter?