I will understand if this thread doesn't go far, but I'm hoping that someone has seen something similar on their R1100S.
I have a Rockster - which shares certain components with the 'S', including the instrument panel.
So: I noticed this morning that my rev counter was behaving very strangely.
I was just making a 5 minute run to work, and realised that the revcounter needle was pegged at the far end of it's sweep - ie against the peg!
When I got to work and turned the key off the needle only returned about 10 degrees - it's just over one of the warning lights - ie still way off the measured range.
The bike was running ok, so I can only assume something weird has happened to the circuitry driving the counter itself.
This weekend I was messing about with some of the wiring - mainly the accessories wiring that's on the bike.
I have 2 accessory circuits on the bike - both running through relays, with a switch on the low-voltage side of the relay (both are PIAA lighting harnesses). The high voltage side of these are wired directly to the battery, AT the battery. The Low voltage side of each is powered by taking power from the instrument lighting circuits - one from the high-beam indicator light circuit (for a PIAA extra light that can only be used with high-beam), the other is attached to one of the other bulb circuits - IIRC it IS one of the rev-counter illumination bulb circuits.
The things I did at the weekend included repairing a loose connection (corroded terminals) in that second low-voltage line.
What confuses me though is : why would the bulb circuit affect the rev-counter circuit itself??
Does anyone have a wiring circuit diagram for the R1100S instruments, including the tacho feed and tacho illumination bulbs?
I've found these diagrams for the R1100S (similar instrument package, as said above), but can't find the rev-counter bulbs. Also there's only 1 mention of the 'tachometer'
http://www.turboferret.co.uk/vehicles/R1100swiring.php
