ok, i bought a 2" tiny tach to install in my 04 heritage f150 with a 4.6l. i also purchased the ford racing Tach Driver because of the lack of a distributor and coil.
it says to tap into the crankshaft position sensor, and hook up a power and ground to the driver box. i have done that all. my tach doesn't move! anyone ever hook up one of these?