Electric jack blowing fuse
Picked up my new Jayco Jay Flight 23mbh yesterday and got home and could not unhitch because the electric jack wasn't working. It had blown the 30 amp fuse. Even when we replaced the fuse, the light ...
Forum Discussion
Hiking Hunter wrote:
A bad ground doesn't make sense. A bad ground is a high resistance connection and would cause the circuit to draw less current, not more. It could make the jack motor not run, but wouldn't blow a fuse.
Check to see if the (new) leg is binding. A leg binding up (maybe only when it is flexed forward or backward) would cause the motor to draw excessive current.
With most of the new jacks, they have an internal ground as well. When you bolt them to the A frame, there's a star washer that needs to "bite" into the frame. Newly painted frames and washers not tightened enough can cause a weak ground. You'll still get power, but it's kind of pulsating. Causing the motor to work harder and blow fuses.
This happened to my buddies trailer when we repainted the frame. We didn't tighten, or "crush, that washer enough over probably too thick of a paint job. Roughing up the paint below it and tightening properly worked.
With an internal ground, you still have a ground wire. So lots of people miss this.
