Si Board Problem. Help!

[325iCabrio]

Does anyone know where a "battery jumper switch" is on an SI board? Apparently I have to turn that on in order for my tach and MPG gauge not to jump around insanely and I can't find the little fucker.

I have the later board, part # 62 11 9 070 793.

[Aznhiga]

I also had something similiar happen to my dash. Except my tach and mpg was gone and the temp gauge was the one jumping around. I fixed the problem by replacing the batteries in the dash. The batteries are rechargable, which by now are probably dying, so that might be causing the gauges to jump.
Thats just my two cents. I dont know if the dashes in the later models have something different.

[325iCabrio]

Yeah, that's pretty much the conclusion I came to. I still want to check them with a volt meter (which I don't have, which is why I haven't done it), but I'm pretty sure they're dead.