[THenne1713]

YES, LOOSE WIRES/ LOOSE BATTERY TERMINALS can be an issue, and maybe bad battery/ies, if voltage drops too low, but voltage should be fine while traveling IF charge circuit from engine/alternator making it to the Coach Battery/ies. COMMON PROBLEM for your symptom (GEN dies under Load) is an INTERMITTENT/FAILING FUEL PUMP, but modify problem to read (GEN DIES WHEN COACH MOVING) adds possibility of LOW GEN OIL LEVEL; (some models) w/ Oil filter use pressure switch, but others like the KY/Micro-quiet have no filter, but do use an OIL FLOAT SWITCH, which can really bounce w/ today's roads/ potholes? Good Luck