Ford Thunderbird Tach

finding the tach wire for remote start?

i remember that when all else fails you can always find the tach wire at the fuel injectors, but i cant remember which wire it is....

theres 2 wires per injector, one of them is the same color on all injectors, but the other is a different color on all injectors....

which one is the one i am supposed to use?
the wire thats the same on all injectors or the one thats different???

i dont have a multimeter to test for it which is why i ask.

if it helps, the car is a 96' ford thunderbird

Its the one thats different.