The alarm is just a pain in the neck (ear?!?) anyway, so I'd like a way to disable it.
I installed a simple toggle switch on the dash of my Class C to disable the whole system. I did it so I could "quietly" run the (gasser) engine to supplement the rooftop A/C (when parked ..... jacks down) if needed; or, to utilize a little heat from the Ford engine rather than fire up my noisy propane heater at night. Just used the Ford engine heat feature last Sunday night in Ft Collins, CO when it got a little too cool about 4AM (for the single blanket I had brought along) .
A couple of months ago, I posted re my intentions over on iRV2 and got a LOT more response than I thought I would. One of the guys designed a latching relay ckt with a momentary switch that will kill the audio screech, but leave the red warning light on ...... then when the ignition key is turned back off, the circuit resets the audio alarm screecher ............... in case the operator forgets.
I got a couple of "don't do it.....you may bend the jacks someday" comments, of course. I religiously use my checklists before I move an inch, so my simple "HWH power disable switch" next to the HWH control panel on the dash works for me. I just interrupted the 12v power source (red wire) right behind the HWH panel there on the dash. I believe folks with a Class A would have a lot easier access......on my Ford chassis it is real tight in there.
My simplistic approach sure wouldn't suit everybody, but I believe there would be few objections to the latching relay fix for the irritating screeching anytime you turn on the ignition with the jacks down. If interested and you can't find the thread over on iRV2, give me a shout and I will try to find it again.
Best................ Ed S in Denver