Correct in the GE cluster tacho wont work without modification on a GTE (needs a resistor soldered in I believe, then it will work. (Have a search on SupraForums.com.au, pretty sure there is a write up on there)
Dont think cruise requires tacho signal to function, but does need a speed signal (pink wire at the ECU from memory) as cruise wont hook in without a speed reference, plus signals from the auto select switch (so it knows when its in gear) and trans solenoids (I think it reads top gear engagement from that, not 100% sure)
I've been scratching my head for ages to get cruise working after a manual conversion, so far without success![]()
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