speedometer issues HELP!

944S2NUT · 11-02-2009, 10:24 PM

Oddest thing happened the past few weeks, my speedometer wasn't registering.

After about 10mins of driving it came back to life telling me how fast I was going.

Sometimes it fluctuates 100km/hr to zero and bounces around 100km to 0km 100km to 0km

It never seems to work if the car sits for more than a day, sometimes even for a few hours.

Any ideas guys?

Really annoying!

Kevin Baker · 11-03-2009, 05:48 PM

Check your grounds. Does it suddenly come back to life if you tap on the instrument panel? I'd expect a problem with the speed sensor, off the gearbox case, to be more consistant. My wifes e30 does the same thing, I cleaned up the contatct points on the printed circut film in back of the instrument cluster and it went away for a while.

944S2NUT · 11-04-2009, 08:53 PM

I did tap on the panel, but I am not sure if it moved from coincidence or what. What grounds were you referring too?

Thanks for your info

11-02-2009, 10:24 PM	#1
944S2NUT Addict Rennlist Member Join Date: Aug 2002 Location: Canada Posts: 3,004	speedometer issues HELP! Oddest thing happened the past few weeks, my speedometer wasn't registering. After about 10mins of driving it came back to life telling me how fast I was going. Sometimes it fluctuates 100km/hr to zero and bounces around 100km to 0km 100km to 0km It never seems to work if the car sits for more than a day, sometimes even for a few hours. Any ideas guys? Really annoying! __________________ 1990 944S2 1984 944 (No sunroof/auto) SOLD to a good home. Visit 944S2NUTS Front Engine Fest gallery! http://gallery.rennlist.com/gallery/...gine-Fest-2004

11-04-2009, 08:53 PM	#3
944S2NUT Addict Rennlist Member Join Date: Aug 2002 Location: Canada Posts: 3,004	I did tap on the panel, but I am not sure if it moved from coincidence or what. What grounds were you referring too? Thanks for your info __________________ 1990 944S2 1984 944 (No sunroof/auto) SOLD to a good home. Visit 944S2NUTS Front Engine Fest gallery! http://gallery.rennlist.com/gallery/...gine-Fest-2004

11-03-2009, 05:48 PM	#2
Kevin Baker Super User Join Date: Nov 2002 Location: Conroe Texas Posts: 2,394	Check your grounds. Does it suddenly come back to life if you tap on the instrument panel? I'd expect a problem with the speed sensor, off the gearbox case, to be more consistant. My wifes e30 does the same thing, I cleaned up the contatct points on the printed circut film in back of the instrument cluster and it went away for a while.