The schematic diagram on page 31-2 of the Ford 1997 Explorer/Mountaineer
Service Manual dealing with "Speed Control," describes the VSS (Vehicle
Speed Sensor, identified as C178) as generating an "AC signal that is
proportionate to vehicle speed." It apparently outputs that signal to a
Grey/Black wire identified as 679. Does anyone on this list know the
specifications of that signal?
I am attempting to tap that signal for the mileage input of a
Time/Speed/Distance computer used for road rallying. To do so I need the
specifications of the signal generated by the VSS.
The identity of an automotive electronic whiz in south Texas, the closer
to San Antonio the better, would also be very helpful.
All assistance will be greatly appreciated.
Thanks,
Bernie Stolzman
