I want to put a digital tach in my pilar tower since im too dumb to hook up the oil pressure gauge... My 02 cav 2.2l has a tach already next to the speedometer (I heard some don't)... I was wondering where the heck the "tach signal wire" is so I can splice the signal wire from the new tach in to it... Can someone please HELP me? PLEASE!!!!!!!!!!!!!!!!

~Jay-DuBB