I have a similar problem. My motor stopped working but the light is working. Will look at the ground later today.
I did talk with Atwood and the 3000lb jack is not for Equalizer hitches. Says so right on the front page of their manual to go to the 4000 lb model (see my other thread here).
I did buy the $15 crank from Atwood (why it isn't included is beyond me. My drill would not power the jack) For those that have the 3000 lb. jack, I would use the handle exclusively for jacking up the trailer and truck on the last 3 inches. Save your motor!