Tach hookup

[Kornnut]

I took my sun pro out when I swapped the interor. I remember what the tach signal wire was actually, but the white and red wires what do they go to? I know the red will be power but is the white an illumnation or what? I can't remember for the life of me.

 

[mackey]

I took my sun pro out when I swapped the interor. I remember what the tach signal wire was actually, but the white and red wires what do they go to? I know the red will be power but is the white an illumnation or what? I can't remember for the life of me.

If there is only 3 wires, I would guess ground.

 

[Kornnut]

If there is only 3 wires, I would guess ground.

There is 4. The black is ground.

 

[parchisi]

I think the white wire is for the gauge lighting.