Minivator stair lift?

I brought this stair lift home from Plymouth on the back of small lorry, it worked before dismantling but upon reconnecting it in home it has stopped? I had to turn it around as it went up rhs first house but has to go up Lhs in mine, my power tester shows it is live on big flat ribbon cable but not on top or bottom controls and not working on chair Any ideas?

Hicksy
June 2011