Power Steering mystery...

Dacia Lodgy - Yesterday's, the car suddenly died. After starting it up with the jump leads after work, many electrical issues where happening like ABS sensor was on the dash, traction control was off, even fuel gauge was saying I had 50km to go when I had 3/4 tank... Drove to the shop to buy a new battery as suspected it was on its last leg, got a new battery without turning motor off, as was about to leave the car park PS failed. Red warning on dash. Managed to drive it home, which brought back many old MoD Landy memories, got home, changed batt, checked charge on batt + alternator, everything fine except, PS still failed. Checked fuse and that's ok, checked the belt and that's ok, can't think of what it could be.

Any thoughts on what I might not be looking at? Got a mate with an OBD pc coming after work but, any ideas?thanks guys

Update: hooked it up to OBD and no fault codes. Checked both fuses and found no faults - possible fried electric motor?