Fuel gauge, tach, and temp gauge all died

[Y30]

Simultaneously.

Driving along and my fuel gauge goes to empty with no warning light on, tach goes to zero and temp goes to zero.

And my e-brake light doesn't turn on when the e-brake is engaged.

What have I done to deserve this??

[bmw325csi]

Sounds like your si board batteries took a dump on you.

[mr.vang]

check your fuse. on my previous e30, the fuse wasn't getting good contact causing the tech to died. i pulled it out and scrape it against the cement and it was working again.

[Y30]

If its the SI board, can you buy them new? Or do you have to replace the batteries.

I've heard some soldering is envolved... #notafan

[bmw325csi]

You can do either, I think its easier to just get a new or reconditioned one over trying to find the right batteries and changing them yourself.

[Y30]

Where do you find new SI boards? A quick google search yielded confusing and limited results.

[bmw325csi]

Guten parts

[Y30]

Awesome. Thanks.

[Y30]

Reviving this thread.

I purchased a new SI board and still no results.

I should mention at this time that every time I start my car I get a blip of life from each part.

My tach goes up. My mgp thing moves. My temp gauge moves. Then after 3 seconds they all peg to zero and don't function until I turn my car off and back on.

Anyone help? I do not feel like ripping my dash apart again if I don't have to.

Thanks guys.

[Y30]

Also!! Important side note.

My fan for my heater/ac doesn't function. But does the same thing. 3 seconds of life and then turns off.

[Y30]

Aaaaand another update.

Everything is functioning. I replaced the board and found a fuse had been blown somewhere in the midst of my tests.

I'll keep you guys posted.