Rev counter decided to stop working

[Donnie]

al the gauges work except for the rev counter and the econo meter, when I started it was just gone, any help would be appreciated

[smithy318i]

SI batteries are dead

[smithy318i]

http://www.e30m3performance.com/mainten ... _Board.htm

[Donnie]

cool guys I'l check it out tommorow

[JAMZ]

My Eco Meter doesnt work at all...flicks to the right now and then and back to 50MPG again and stays there..

Rev meter works fine and all outher bulbs and dials work fine too exept this one...this happened when i changed my dials...would just the eco be affected by low batts?

[Brianmoooore]

Last case of no tacho I sorted was a poor connection in the C101 engine loom connector on the bulkhead.(pin 9, black wire)