I just got the greddy turbo timer and harness.... but i dont know what the purpose of it is? Does it actually plug into something or do i still have to splice the wires ?

 

You still have to splice the wires because greedy doesnt make a harness for a honda or acura application but in the forced induction forum Lightning orders has a custom one tghat will plug and play with that timer

 

do you know what these other 3 wires are for?

gray
purple
brown?

 

Brown goes to the parking brake and the grey isnt used and as far as the purple it goes to the tach signal wire I think