E30 MPG Meter stoped working

[Dalboy]

Hi I had to replace the battary on my 1993 E30 Touring 316i Lux Auto over the weekend. The MPG meter has since stopped working. I have checked all the fuses in the fuse box and they are all ok. However I do had a faulty SI board which displays the service lights randomly. Could this fault be linked to the SI board problem or is it a faulty guage/relay or other hidden fuse some where.

Many thanks

Dal

[Ant]

High Dal,

this is normally down to duff SI batts, they leak and the acid slowly eats the PCB in the cluster, then stuff stops working

best bet , used cluster with a known good SI board, you may be able to salvage yours if you act fast enough

HTH

[Brianmoooore]

The initial problem with the batteries is that they go short circuit, rather than just don't work. They will leak after a while, but unless the dud SI board has been neglected for years, I usually find that corrosion of the board hasn't gone to far.

[Dalboy]

Thanks guys I'll replace them over the w/e, bought them a while back but just haven't plucked the courage to replace them