Speedo problem - BMW Luxury Touring Community
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post #1 of 2 Old Jan 23rd, 2019, 4:33 pm Thread Starter
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Location: Brisbane Australia
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Speedo problem

A couple of months ago I started out on a weekend ride and looked down to see my speedo needle sitting on zero. Great start to a trip I thought. While riding along I decided to try a couple of things.
I found that my cruise control wouldn't turn on either. If I quickly stabbed on the brakes the speedo would suddenly try to work and then drop back down. By the time I got to the next township 15 minutes up the road it all came good. It never played up for the rest of the trip and hasn't since. The night before the trip I decided to give the bike a good check over and had my hands in some tight spots. My initial thought was perhaps I disturbed a ground wire that sorted its self out with vibration.

What are your thought lads.
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post #2 of 2 Old Jan 23rd, 2019, 6:27 pm
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Join Date: May 2004
Location: Hazel Green, AL, USA
Posts: 13,218
Re: Speedo problem

On an 05 the speedo signal is developed from the rear wheel ABS sensor and fed to the ABS where it is turned into the TAS and TA- signals and fed to the instrument panel. Not much in between. The instrument panel generates a TAA signal fed to the cruise control as TACO.

Could be a loose connection at the ABS or the dash.

The old models (99-2001) were easy as it was a separate sensor on the FD and the cable tie up near the brake hard line would cut the wires. That would cause the speedo to go flaky.

2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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