What do you mean by the jacks behaved worse after you swapped the wires. Can you help someone like me visualize what is happening?
Originally as reported
All jacks work at once. That makes sense to me
The rear jacks work ok. Does that mean you can extend each rear jack individually or just extend them as a pair?
The Fronts don't work. Yep easy to understand.
You then tried swapping the wires and said it got worse. Can you describe what happened? Did you suddenly have no jacks? Did all the jacks except one rear stop working? If so which jack? Did a front jack ever try to work? If so which jack?