teleflex tach hook up

[dave lee]

i got a new tach for force 125,1987 it is a 20 pole tach. i noticed that the purple wire from the motor goes thru the ignition so should this wire go to the ignition terminal or the sending one.

 

[foodfisher]

Re: teleflex tach hook up

Double check to be sure it's the same wire. My '86 purple wire for the tach was folded back and black taped to the wiring harness. Note: There was no previous tach installed.

 

[sho3boater]

Re: teleflex tach hook up

Some tach wires go through the ignition box. You can hook it to the stator wires that go to the rectifier, the wires not going to the ignition system (use one of the two, and that should be the same as the tach wire). On the tach itself 'ignition' means a wire that is 12v only when the key is on; for a power source. 'Signal' is the stator, the alternator part of it.

I'm not sure why the CDI would use the tach wire, except for a power source maybe. It could turn that AC power into higher voltage than the 12v the rectifier makes if they wanted to.