default wrote in message
...
On Mon, 9 Jan 2006 15:00:37 -0000, "Barney"
wrote:

Yes this is three wire too, but with a 12 volt supply - I think they
usually
have a voltage regulator, so that the supply voltage can be anything from
about +3 volts to +24 volts. If the output is roughly a square wave from
0
to +5 volts I should be able make a simple tester for it quite easily.

Nice thing about it is you can slowly turn the engine and watch it
turn on and off with a meter or use a magnet . . .


That's an excellent idea. I don't need any kind of a tester - I can just
take out the spark plugs, and then use your method of turning the engine
over slowly and measuring the output with a meter.
Cheers.