Half my gauge cluster not working

[e30_mike]

So hereÂ’s my first post on this forum. I recently got a 1990 325iC, it has a few issues, many of which have already been resolved but one thing iÂ’m really not sure what to do about is the gauge cluster. Only the left side works, weirdly, so the fuel gauge and speedo work, but not the tach, odometer, mpg or temp gauge. I honestly donÂ’t really know much about this kind of issue or electrical in general. If this means anything, when i first turn the key the mpg moves a hair, and if i whack the dashboard all the gauges jump a little. Any help is appreciated. Thanks :)

[george graves]

Check fuses. Then google more.

[e30_mike]

Check fuses. Then google more.

Fuses were the first thing i checked, replaced every fuse that has to due with the cluster, no luck unfortunately

[IceWhite]

Gauge Cluster batteries.

[efficient]

Check the plugs in the black. Make sure they are tight.

[e30davie]

check fuse 10 or 11, i cant recall which one it is.

I had one of them go, its the same refuse that does the reverse lights and in my case (and common) is that the reverse wires chafe on the tunnel hole.

[Gregs///M]

If fuses have been replaced, your SI board is dead. Very common issue.