First eliminate the pedestal. Unplug your RV and plug a lamp into the plug see if it flickers. If it does you know the problem is there.
Are you using a good surge protector? They will indicate if you have an open somewhere or an intermittent. Then try the suggestions above.
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.