Scr3200, both tach’s quit at same time. Blue wires/ yellow tracer disappears on starboard wireing harness. Tach wires are gray on neg (2) purple on + (1). Fuses on term block good. Maxum wiring not designate enough.
Any help would b appreciated
Custom900c
Under Documents of this site you will find the Maxum manual for both the 3200 and its successor 330 which include the wiring diagrams. The gray wire comes from the ignition coil negative terminal and provides pulses to the tach sense terminal. The tach should also have a purple power wire along with a black negative.
Tach failure
Linear Mode
