Hi there
After a little searching I came across this thread which does go some way to answering the question I have, but not entirely.
My r33 intermittently suffers from the ticking described in this thread, and I was glad to learn of its source, but I'd like to know what purpose of the box is before I just disconnect it.
I notice it stops and goes to a normal rhythm when i use the indicators, but will resume once the indicator is off, and seems to tick at 2 slightly different speeds, swapping between approx 2 ticks a second and 3 ticks a second, possibly linked to throttle increase/decrease which makes me wonder if it's a diagnostic of some kind, but can also seem random at times.
I'm yet to take the dash or cluster out so I don't know what the wiring is like back there. All the gauges and dash lights appear to function normally, with the exception of the "D" for drive light which will only come on after 30-60 mins driving.
An Immobilizer (I think only 2 point) and cd head unit are the only additions to the wiring.
I don't have an owners manual, only workshop, so if anyone can shed any light on these symptoms I would really appreciate it.
Cheers, Yosh.