I have been troubleshooting this problem and found that it is electrical. All the roller are working and there is no binding going on. The voltage at the motor drops significantly when operated. I had the motor checked out and it is good. I need to track down the DC supply back to the batteries. The same house batteries do operate the hydraulic pumps for the levelers and the other slide without a voltage drop. I suspect a bad ground or switch in this circuit but find it difficult to locate these connections without a wiring diagram of how they run through the coach. It is time consuming it may be easier to run a new wire.
