tach ?'s

[RangerSphinx]

ok guys i just got an aftermarket tach for my 88 ranger w/ an 4.0 from an 94 exlorer. does anyone know what wire that i need to splice the green wire into. it has the coil pack. with three negitive wires that run to the comp. i have read that i need the tan/yel wire, but i do not have this set of wires that run to the dash. would anyone be able to give me a hand with this one. thanks alot sphinx

 

[JunkYardRanger]

the tan and yellow wire that is being referred to is in the main harness going to the computer works like a charm