Hi Peter, usually something around 8V.
The ballast is switched out of circuit when you turn the key to 'Start', i.e. when starter motor is in circuit to give a fatter spark for starting.
So, yes, you will need to buy a coil that is rated to run at 12V continuously...
I'll see if I can find a name/number on mine (and attempt to measure those plates at the same time...
Graham,
thanks for the advice,
my coil looks like a ford one , the same as the dissy (motocraft), I contacted the company and they said that it should not matter,
Quote: Thank you for your email.
In most cases the coil and ballast can be left the same as before and only
if there is a problem with starting should there be a change to that part of
the systems.
Now I'm confused yet again
