Had similar problem. Look at your generator. If it is the 7500 quiet diesel Onan the switch is on the R side of the generator just below the coolant chamber & the oil check.
The way GS wires their coaches, the generator usually has two 37 amps circuits. If you try to run more than 37 amps on one circuit it will throw the switch. Have figured out that the A/C's are on one circuit but do not know what is on that circuit with them.
07 TM 40D;ISL 450 Cummins(upgraded). Very happy w/coach
Gnarly toad to scoot around.
Geocaching, hiking, fishing, National Parks, Civil War sites.