Rev counter, MPG swingometer thingy not working :(

[chinchilla]

I have a 1990 H reg 320i cab

The rev counter, MPG swingometer, clock, stereo are all not working not sure if thats all

I think it happened a few weeks ago when i was changing the interior bulb (oh yeah the interior bulb dont work either!)

Any one know what the problem is? fuse gone?

Also the rev counter jumps up and down from time to time...

[march109]

Bad earth more than likely, far more experts out thre than me, but if it was a fuse they'd be no movement whatsoever from rev counter.

[jon_pure_british]

check all your fuses,

im not sure if the electrics are controlled by a relay (might be) if they are then find the corresponding relay and get it tested!

[Brianmoooore]

Sounds like fuse 21 is blown, as that supplies interior lights, radio memory, clock, and is one of the feeds to the instrument cluster.
Sort that first, then see if the tacho behaves itself.