USE STOCK TACH AFTER DOHC SWAP

[NicUzumaki]

I recently swapped a 93 dohc ka24de into my 90 240sx
along with some hassles making the wiring harness match the engine i started to wonder why the stock tach wouldnt work. the answer is simple
power
there is no power wire running to it, the fsm says its a yellow/red wire that powers it. which is true and i will get back to that in a second.
my new engine has a dizzy coilpack unit, not separate like the sohc, the two together needed a 6 pinned connector and a 2 pin, the harness had a 2 pin a 3 pin and one 4 pinned connector, the 2 pin clicks in, u then have to splice the 4 pin and 3 pin together to make a 6 pin. thats fine and great, but on the 3 pin after u splice there is one wire left, a green/ black, that powers ur tach, run that down to ur ecu and splice it in with ur yellow/red and voila u have a working stock tach! if u notice on ur ecu there is two yellow/reds thats fine, splice it into the one that goes the lowest on the harness, or locate the pig tail smaller sub harness and follow that one in!