I recently purchased a 5in autometer tachometer w/ shift light. I understand the wiring diagram up to the part where it says hook the white wire up to lighting source, and the red wire to the ignition switch, where are these located? i am sure this is a newbie question but I have never installed a tach before and I wan to do it right. Any help would be appreciated

 

i believe the ignition wire your speaking of is the coil wire, and for mine for the lighting i just jammed it into the fuse box into the fuse that is only used when your dash is lit. mine is just ghetto tho

 

there is a green wire that goes to the top of the coil the negative terminla to be specific but the red wire goes tot he ignition switch i dont know where that i and I dont know where the white wire is suppose to go it just says light source.

 

If you really want to get fancy, you can splice the lighting wire into your dimmer switxh for the dash and you tach light will dim with your dashlights. I just wired mine into the fuse for the headlights.

 

thats what i did,hooked it up to my dimmer switch.............i play with it all the time

 

 

ok so white wire goes to the fuse box for light source now where is the ingnition switch for the red wire to go to?

 

Red goes to negative coil post.

 

Bring both red and white to your light terminal, Use a meter and find the one that is hot when you turn on the ignition,that is where the red wire will go. Next check to see which one is hot when you turn on the headlights, that is were the white wire should go.

 

No green should go there