Solution to Intermittant Flashing Instrument Cluster
Those of you waiting for a resolution to this problem can relax, it's solved!
The problem was that the entire instrument module would frequently, as in once every few seconds, start flashing ALL warning lights, and while flashing, pretty much everything connected to the canbus would cease to function, leaving me with no turn signals, brake lights, ESA control, fuel and temperature levels, etc.
On some days, the instrument module would be totally dark at startup, and I would have no indicators at all.
Engine functions and head and tail lights were not affected at all, the bike ran great.I don't know if ABS was active.
Needless to say this was an issue for me in riding, and was also going to make it hard, or expensive, to sell this bike some day.
I recently started looking around the internet for wiring diagrams for the 2008 GT, but these are not easily found.
Looking at the parts diagrams and ads for BMW wiring harnesses ($$$$) lead me to start thinking about the complex of electronics modules and wiring on these bikes.
It appears that almost everything related to the bikes electronics goes through the ZFE or Central Vehicle Electronics (In German: Zentrale-Fahrzeug-Elektronik) module.
The ZFE is accessed by removing the right side tupperware, up front right in front of the air snorkel, and is a book sized silver component.
The wiring of this module consists of several huge and a few small cables running to components all over the bike.
One web site I found discussed an intermittent instrument electronics failure like mine that was resolved when a technician traced out some frayed wires in the bundle going from the instrument cluster to the ZFE!
I pulled the tupperware, loosened up the two screws and the press on rubber vibration isolating grommet on the ZFE, turned on the ignition. My instruments were totally dark at this point.
I jiggled (tech term) the ZFR, moving the cable bunch about. The instruments lit up!
I disconnected and inspected all connectors to the ZFE, pulled on the wires, adjusted the cable ties to relieve pinching, etc.
At some point the instruments stopped flashing and stayed on, so I reinstalled the ZFE and took the bike for a ride.
So far, no problems.
So, the good news is I now think I know WHERE the issue is, and feel confident that I can eventually trace the specific wire or connector that is failing. If the problem recurs I can start to open up the wiring harness at this specific area and troubleshoot, and eventually repair or replace as required.
Thanks for your attention.
2008 K1200GT, Custom Paint, Vivid Black, Aeroflow WS & Aeroguards, Givi E52 Maxia Topcase w/AdMore Lighting, Zumo 660, Suburban Footpeg Lowering, Sargent Seat
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1974 Norton Commando 850 Soon to be a restoration project