Not familiar with your coach at all. Sounds like you have some serious electrical issues besides the jack problem (maybe related?). Are your coach batteries fully charged (12.6 vdc unloaded)? Does being on shore power with coach disconnect operated actually charge the batteries (13.2 +)? A clicking relay in the BCC every 5 seconds sounds more like a battery voltage sensing problem perhaps......does the relay only click when engine is running.......under what specific charging conditions does the relay click?
Regarding the jack problem, it sounds from your description, like the pump motor run contactor is operating, but the pump motor is not actually running? Low battery voltage; poor connection; bad main contacts in pump motor contactor; bad pump motor? If your jacks are HWH 200 series, they have some good free manuals with troubleshooting info on line.
__________________
|