Only way brakes would cause the TOD to go crazy is if they were rubbing(I think). You should be able to hear that though. Could be sensors, computer or a number of other electrical things. Check wiring for anything chaf'd, wires or plugs pulled loose especially in areas of recent work.Have you been driving in water lately (mud, rain, water crossings)?
hopefully someone will chime in who has had other TOD exoeriences!
Does it do it all the time, itermittent, under certain situations only? The more info, the easier it will be for others to help diagnose.

PS if you just had tires put on make sure they didn't pinch or knock any wiring or plugs in that area loose.