Aftermarket tach installation
#1
Aftermarket tach installation
I have a "91 super-duty 350 with a 460 engine. I have installed a auto meter tach, but don't know which wire from the distributor I can use for the pick up. The coil wires all seem to have a constant 12 volt output. Where is the negative side of the coil? Any and all help will be appreciated greatly. Thanks