Omc Tach Cable

[mikegj]

HI ALL
Question reguarding OMC tach cable P/N 174732 just got my cable today and found it has 5 leads on it 2 purple, 2 black, 1 gray but wiring diagram shows only 3 wires total and plug only has 3 pins. Do I use all 5 wires or do I clip and cap 1 black 1 purple? boat had no gauges when I bought it so I don't hav a clue can anybody help Thanks in advance

 

[guy74]

Re: Omc Tach Cable

The extra purple and black wires are for other accessories (gauges) if you want to switch them on and off with the key. (voltmeter)

 

[mikegj]

Re: Omc Tach Cable

thanks
do both the black and the purple do the same thing?

 

[ezeke]

Re: Omc Tach Cable

Black is ground, purple is 12V positive from the accessories post on the ignition switch. The accessories means things like guages; be careful not to overload the harness wiring.