Tach wireing

[Alarus]

i have just bought a tach for my 73, i am mounting it on my colome, the question is how do i wire it, so the lights work, it has 4 wires. ground, to the coil(know where those go) and ignition, and lights, the ignition and lights are what i need to know how to hook up, do i need to splice wires?...any pictures would be greatley appreciated.
R.L.

 

[gbarber]

If I remember correctly, I used one of those plastic slicing clips. (I don't know a technical name for them) I pulled my gauge cluster out and spliced the lighting wire onto one of the lights in my instrument panel.
I ran the other wire to one of the acc. fuses in the fuse box

 

[jes72mustang]

I think on my 72 I used the same splice clip refered to above and spliced it to the wire coming off my head light switch so that the light on the tach only came on when the headlights are on. I also mounted mine on the column.

View attachment 508717

 

[mustangman70]

Allright, 4 wires will hook up as followes

Red- switched 12v source
black- ground
white- headlight lead
green negative side of coil


Do ya have a volt meter? this makes it easier to figure out what fuse is coming on with the key, or you can plug and play lol But i have all my 12 volt wires going to the fuse box. As for the light there should be a wire coming from the switch.

 

[Alarus]

I got the wireing all figured out and got it all wired, it works great, i do have a question tho, what is the acc wire for???
RL

 

[mustangman70]

The red wire???? thats what gives the tach the "power"

Basicly this the wire or source turns the tach on