Tach Wire

My friend has a 91 civic hatch std and it never came with a tach. We want to get one and put it in but where is the tach wire? Pics would be noice.

the solid blue one going to the dizzy. or ecu pin B15.

yep blue wire. good luck

Dizzy is the distributer? Can i get to it from behing the dash?

dizzy is in the engine bay. passenger side of the car, next to the battery. has your spark plug wires coming off of it. the ecu is under the carpet, under the dash, on the passenger side.

there will be pin numbers on the ecu pins. find b15 and splic a little bit of wire off of it then connect your tacxh wire to it. please correct me if im wrong. i have done this three times but one of the times it just made my car run like crap untill i took the wire off again.