I p-mailed the original questioner, but I see now that others are
curious too.

12v is easily available on the back of the alternator. At least on the
Digijets...  Dunno about the Digifants. The big stud with the 10 ga red
wire goes straight to the battery.

Jim

Malcolm Stebbins wrote:
> I think that one can take 12 volts from the coil, but the key must be
> "on" (but not necessarily the engine).  For the timing light, engine 'on'
> should work fine.