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I picked up an OMC Tach, newer than the older unit I started with. The newer one does have a pulse switch adjustment, but it does not have any pre-wired leads.
Does anyone have a tachometer wiring diagram they could share? It has a battery, ground, signal, and ‘sync starboard and sync port terminal poles.’ Than a purple lead coming off the back light lamp.
The older unit I have has everything pre-wired with a quick 3-prong accessory plug.
I’m guessing grey goes to pulse, black to ground, purple to battery (these all come from the engine harness out to the motor)? Purple light lead ties to the battery pole for positive, black goes to ground which lets the light illuminate. There’s a 2nd purple wire coming off the engine harness where I believe that lead splits for other accessory power?
Thanks for the help.