How do you install a aftermarket tachometer on a 1992 Mazda B2600I 2.6L 4x4 when there is no factory tachometer?
You will need to connect the tach to a ground and +12v source,
the signal wire will have to be connected to the ground on the
coil. Since the truck is fuel injected, you will likely have to
find a way to wire it in with the connector on the coil.
Kyrasis6
Mazdatruckin.com