Decided to dismantle the pedals. 24 screws later I was looking at the inner workings. Scratched my head for a while and eventually identified the Z axis potentiometer. Fiddled with it a little bit and quickly realised that one of three wires was unconnected. Ureka!
Phoned a neighbour with a soldering iron and he did a job on it. Before he arrived, I had to strip the insulation back on the tiny wire. Got it wrong a few times but the wire was still just long enough.
Reasembled it and put it to the Test. It worked!!!..for 10 seconds and then it broke again. With the wire a little bit shorter now It must have been hit by the mechanism and ripped off again 
Gonne have to wait for a new one, which has now been delayed till Monday