OK this is embarrassing somewhat, but then we can concur there is an issue elsewhere. Possibly as wanderer stated.
So I followed the trail to the shed and to camper. Testing outlet. Ext sides, dogbone etc.. All 120 volts.
Get back in camper and killawatt meter ( P3) still says 136 volts.
Walla! Have meter in hand so pull out killawatt from outlet and plug in leads of meter..
Guess what................................................................................................................
a/c on 110.5 volts.Ha ha ha ha ha ha ha ha ....
a/c off 122 volts...
I assume I should ditch the killawatt. but maybe its still good for amp readings??
I trusted that kilowatt meter for many many years. How did it get so far out of whack?????
Man I wonder how many camp grounds I have been at with brown out situations but I just kept running because kilowatt said so.
So now back to the original question.... ugggggggg
