Installing an afteramrket tacho on my dads 84 sportswagon.
Not sure if anyone has had one or a brumby even would be similar
The guage I have requires power earth and a wire to the coil. I thought most tacho got the power from the coil??
Anyways the question is where should I draw this power from?? Ignition or accesories or either?? Ive had a poke around and ive found it hard to trace the wires so where should i tap into them??
Any help would be great

Cheers