I have a Brantz International 2 Pro rally trip meter which can, when seleced
by a toggle switch, give a display of your average speed on an LED digital
display.
This trip meter is positioned in fron to the navigator in Targa Rallying and
I want to duplicate the average speed readout on a panel in front of me, the
driver.
What is likely to be the signal that creates this digital display, would it
be a voltage that is interpreted by the LED readout or some thing else
entirely?
Any help or guidence on how to do this would be very much appreciated.

Mike S