Slide out pump selinoids sticking

[bsmeaton]

That sounds like a serious issue that will be hard to troubleshoot.

After the episode with your grandson, I would start replacing solenoids and not stop until the switch was replaced and all the wiring inbetween. (possibly a short in the wiring?).

The last thing you want to see happen going down the interstate is you are suddenly 16' wide instead of the 8-1/2' you thought you were.