Have been having intermittent trouble with the tongue jack and Joe Z came by last week and we took it apart and determined the switch was bad.  Ordered a momentary on-off-on pole reversing switch and voila jack is working good as new.

30 Amp Toggle Switch 3 Position Polarity Reversing DC Motor Control- Momentary

Also took all the faded white plastic parts off and shot them with gloss black rustoleum plastic spray paint.  Really cleaned up the look of the jack.

Big shout out to Joe Z for his diagnostic help on this one!