electrical problem Help

Drew its 120 volts at the house. Even when plugged in to 50 amp service it does the same..

Is this 12V power (lights and stuff) or 120V power?

If it's 12V power, possibly there's a self-resetting circuit breaker that's cycling either from an overload or because it's old and worn out.

mfitz709 wrote:
Not a breaker, I've looked for a short with no luck.

Not a breaker tripping but maybe one going bad.
You NEED a meter to find out exactly where the power is disappearing.

It would not be a short you are looking for but an intermittent OPEN, a bad connection somewhere.

But if you have a power management system, the previous post applies. I would think/hope that if that was the problem that that system would make some alarms or light some warning lights.

Sounds like you may have a electrical management system that is sensing a bad current source and is shutting it down to protect your RV. The EMS could also be bad. Or, you could have a bad transfer switch.