If your car is 2nd hand try if your ABS is really working! A piece of road without traffic, speed up and then make a full stop.Remove the loose things from the car in advance.
i'm affraid u'll need a new/faultless fusebox, cos the HD warning alone means a relay which is an unreplaceable part of it...see attached file, second line, that break lamps relay is defined HDC relay in the diagrams... i made investigations about it without much effect...read this if u want to know more http://www.landyzone.co.uk/lz/f8/diagrams-vs-reality-mystery-am-i-dumb-160328.html