What do you need a shift light for Razy?
I'm not sure how the tach is controled on the i30 CRDi , would probably run off a sensor on the crank. shift lights normaly trigger from fequency. i have noticed it's very hard to get good reliable shift lights that work right with the newer ECU's . i use one on my harley but i use the old style pill insert, its very reliable and trouble free, each pill has a set fequency and has written on them how many revs the trigger the light at, mine is very bright made by MSD.