ok i got a tach from sunpro and ive got evrything mounted and all my wires done EXCEPT one. the green one wthich provides the tach with the PRM signal. it says u hook it to the white wire coming out of the powertrain control module located behind the passenger side strut tower. the only problem is the are more than one white wire. does anyone know which one it is? or can help me? (it also says the pin ID is 8)

 

if you remove the neg cable from battery and remove the plugs from pcm 7mm headed bolts there are numers at corners of plug sokets to go by then tap in to pin id 8 reinstall and conect batt neg.