2004 fleetwood tioga electrical problem

[Lbejune]

I have a 2004 fleetwood tioga 31w. It's a class c with onboard generator. Forgive me as I know nothing about motorhomes, I am posting for my husband.

Our motorhome is plugged in at home and everything works fine there. We live in AZ so it does get VERY hot here. We recently went camping up north and had some issues. We can't go back out til we fix the problems so here is what happened:

1. While driving, the air in the cockpit was fluctuating between the face, feet and defrost area. It changed depending on how fast we went and when the engine shifted.

2. When plugged into shore power at campsites (2different sites), the AC, fridge and any lights would run fine for about 20 minutes. We had on the radio and the power started fading out and would stop. Then it would turn back on. Now we can't get the A.C. to turn on or lights and the fridge kept switching between A.C. and L.P. power but wouldn't stay on either one.
Got to the 2nd location and plugged into shore power and tried to use the microwave and everything stopped working.
So we thought maybe if we switch to the generator it would work, couldn't get the generator to stay on.

Drove back home and plugged it in here and everything works fine again.

Any thoughts would help.
Thank you.

[Ranger Smith]

#1 Sounds like you have a vacuum leak somewhere as that is controlled by engine vacuum I believe.

#2 Sounds like a bad or loose connection in the transfer switch or in the electrical box itself.

[trx430ex]

1 is definitely a vacume leak, had that happen in my 98 E350, was a black cracked line near the battery that runs with the wire harness.
2 - would second first advise.
3 - Ranger Smith, you have my rig!!