Installing Tach on '02 1500 Intruder LC

[LCHRIS]

4 wires from the tach. Black and Blue are the light circuit, no problem. The other two, red and green. One goes to a coil, where does the other go. I've tried every combination and the tach doesn't respond. The tach is new but I'm thinking it may be defective.
- one wire on each coil terminal shorts out the coil, the bike runs on one cylinder
- either wire to either side of the coil, the other to ground, no response.
- the instructions(?) said to put one wire to battery, the other to the coil. Whatever, that didn't work either.
The dealerships only want to sell you new bikes and clothes, they don't know either.
If anyone can help, I would sure appreciate it. Thanks...

[Uncle Bob]

Hope this is right for your model.

Black= Universal ground for the unit connect to frame or negative terminal of battery.

Blue= Power lead for the light

Red=Power lead for the tach

Green= Coil sensor

Splice both the blue and your red wire together to a power source ( I tapped in to the light circuit that way the unit is on when the bike is on ). ground the Black to the frame or the negative terminal of the battery and of course the green to the coil ( on my bike I spliced it to the green/black wire).

You should be good to go, the unit isn't working now since your power source for the tach isn't connected.

[LCHRIS]

My tach is now working, thanks to Uncle Bob.