renault megane dreaded electrics (2004 1.6)?

help please, car broke down last week, stalled and wouldnt idle. called aa. it started first time for him. lasted 2 days went again. plugged in for code = lamba senser, done 200 miles it purred. now broken aagin. car runs fine, however wipers on all the time, no speedo no rev counter, service light on, headlaight and flashers on all the time. fuel pump runs when vehicle locked. cant turn vehicle off with the off switch, have to atall it on the clutch. please someone help