i have just changed my 1990 ea s pac from a 4sp auto to a t5 manual and now i have now reverse lights or speed,the harness from the manual had an 8 pin plug and a single pin plug,8 pin plugged in and it started but the is no plug for the single pin.What is the single pin for?would the speedo sensor be part of the big round plug for the auto as there was the 8 pin and a round one with 10 pins or so i think,any help to get my speedo working at least greatly appreciated,

hi mate.i have a ea s pac manual ecu if you want to by it from me.pm me

Mate i had the same problem when i did the exact same conversion. After all my troubles and everything i took it to the auto electrician and it cost me $100 and works fine... its my only suggestion... Brad