ABS, ASC (traction control) Lights on

[MISS BM 712]

For E38, 728i 96Randomly last night, my Speedo stopped working periodically and my ABS and Traction Control light are now permanently on. Have tried turning car off and on etc. I think it may be the vibrations as I got my exhaust modified...

I am assuming it is the sensor, but can someone give more advice, and possibly a DIY on how to test and fix? Should be similar to an E39..

[BM WORLD 1283]

more than likley a faulty abs/asc control module , quite comon part to fail , can get them repaired if needed

or it could be a abs sensor

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[MISS BM 712]

Seems to only being doing it when it is wet - fine in dry weather.. typical right when it might ever be required!

Another thing has started coming through - petrol gauge, and range gauge are going a bit funny on me... Light goes on, goes off, beeps at the 50k mark, did this the whole way home... Only when the ABS/Traction Control, and speedo stopped working.

[Ahmedsinc 414]

Possibly a knock-on effect from jump starting the car? I know nothing of E38s other than the electronic wizardry starting getting fairly complex from then on.

Perhaps Hotwire would have a theory?