Check the fuses under the seat, remove and clean them and check that none are partially blown. Pay special attention to the 10A one for the dashboard.
Also, check your wiring around the steering head for any chafed wires or ones that look they may have been stretched.
If all else fails, try disconnecting the battery for 30 minutes or more and pay attention to thecorrect orientation of the leads particularly the ABS positive cable - it should be directly above the positive battery lead and below any accessory cables you may have attached to the + terminal, for some reason they are very sensitive to that. Not a bad idea to fully charge the battery whilst it is disconnected as a low battery can sometimes produce weird results, Check that the ground wires are clean and tight while you're at it.
If after that you're still experiencing problems it might pay to get the dealer to plug their diagnostic tool in and see if there are any stored fault codes.
That's about all I've got.... good luck.
