You probably don't need it! Most starters have a tachless mode that runs off of voltage to see if your car is running. With your engine turned off, turn on the headlights, air-conditioner, radio and any other devise that uses a lot of power. Do this for about 2-3 min. Then plug the main power wire harness into the starter module. The module will then register that the NORMAL voltage of the car is LESS than 12 Volts. By turning all of that stuff on, the car will loose some of it's voltage! When you start the car the alternator will actually put out more Voltage than 12 V. If you measure the main 12V wires in Some cars while they are running you will see up to a 14 Volt reading on a volt meter. All in all... the starter module reads 12 volts when the car is turned off and 14 volts when the car is running... That how it knows if it is running or not. So you won't need the tack wire. There is probably a jumper you'll have to switch inside the module to get it into tachless mode. Hope that helped???:shrug:
