I would like some advice on the best way of counting pulses. I have no idea of the frequency.
My sympathy if you are working with the electronics of a Rover - when we travel in remote areas of Australian outback we seem to frequently need to resolve and support Landrover difficulties.
A friend has suggested using a frequency to voltage converter IC and then sampling the voltage in the arduino.
Do you mean that I would need a voltage divider to bring down the voltage to a 0-5v range so that it can be read by the Arduino?
See: https://www.sparkfun.com/products/10244 for one supplier - there are others via ebay etc etc
Why dont you use an arduino and a gps module that way you will avoid the fuss of reverse engineering the protocols and the diferences in wheel base.Problem Solved