Sounds like a loose wire somewhere after the converter. There may be a common ground for all of those lights or it could be the 12V. One clue could be if they are all on the same fuse or if they're on the same fuse as those on the RHS. If there is a fuse that's common with lights that are working then I would strongly suspect a ground connection.

Could be a PITA to trace.

Interference patterns?

Ok I promise, no rants! I'm lousy at them anyway.

I just started posting here a few days ago although I am quite active on other forums. I'd guess my first post was probably 3 days ago. Since then no one has replied to any post! Am I the only one on here? If so, maybe it's the place to put all the common rants to get them off my chest.

I'm late to the party with this response but maybe it will help someone so here goes:

1. It's easy to tell a "regular" from an "extended cab over" Lance. In the regular the bed is crosswise, in the extended it is in line with the rest of the TC.

2. I carried a newer '05 Lance 981Max on a '91 F350 CC drw for years that had the 7.5L and it was no problem. Again it was a Dually so that added quite a bit to my max GCWR but in my mind the main advantage was increased stability. I had some experience with that since the rig before was a smaller Lance 815 lite on an '89 F250 diesel.

Off the truck, yes. On the truck, no.
Older ones with hydraulic jacks, particularly those with only 3 hydraulic jacks probably were more prone to it. Certainly it can happen to a current model. The instructions for Atwood jacks specifically warn you not to raise the back of the camper more than the rear and also not to raise one side higher than the other. Either of those conditions could cause a jack to buckle according to their owners manual.
On another forum there was a thread with pictures of a relatively new Lance that had been blown over in snow and wind. It required a 65T crane to right it as I remember. Incredibly the damage appeared relatively minor.
Again this is a bit off topic but I have been in RV Parks where I have been told I could not take the camper off the truck (Oasis RV Park in Las Vegas is an example.) My guess is their insurance company is concerned about just such an occurrence. I think most of it is left over from the days of hydraulics however.

I live in the West and even out here it varies tremendously. Here in San Diego there are very few and I don't believe that we have any dealers of hard sided TC presently. On the other hand the largest Lance dealer in the U.S. Is 2 hours north in Ontario, Ca. Lots of equestrian activity up that way.

They are also more common the the NorthWest.

TC popularity took a dive 15 or 20 years ago when Toy Haulers came along since they permit you to carry your toys and give you camping space.

Probably not in the manual because winterizing and heated tanks may have been a option on the 815. I had one back in 2005 but can't remember. You can download the appropriate year Lance brochure from their site and that will tell you what was standard and what components are optional.

I think about 35 amps. As Lance points out in their owners manual, you MUST have an 8ga charge wire and return. Don't know how your TC is connected to the truck, but most typical trailer wiring connectors only support smaller wire sizes. As I said in another post, I use a 9 way Pollak for my camper.

I'd ask Lance Customer service to get their opinion.

That ain't necessarily so! Depends on the camper. Many Lance campers are equipped with 3-way reefers. When they are run on DC (batteries) they will draw about 35 amps. The charge wire on the typical 7 way trailer plug cannot support that typ of current. That's the reason why Lance specifies their own connector that will accept an 8ga charge wire.

In my truck I am using a more common, but still sort of unusual Pollak 9 way connector. The previous owner had that installed to power a 5th wheel. It also uses an 8ga charge wire.

Another precaution which is noted in the Lance manual is that the fridge should only be on DC when connected to the truck and when the truck is running. Otherwise it will drain the batteries in a heartbeat. It's meant for when you are tooling down the road and want a cool beverage.

Seems to me that before you start adding stuff you need to figure out what camper to purchase.

Also when you go to the sales lot, don't let the sales guy oversell you. They're famous for saying you can mount a 4000# camper on a Volkswagon!

Got an outside shower? If so be certain that both faucets are completely turned off. The water will flow through the shower head and return in the lines.

Had exactly this problem about a decade ago in a Lance and it was a bear to figure out.

My EU2000i runs the A/C in my 28' TT just fine as long as I'm not trying to run anything else with it. Same with the 2500w propane Onan in the TC. That ones running a considerably older A/C unit and my bet is that the smaller Honda wouldn't do it.

Other factors will have an effect, like altitude. I spent last summer in the TT at 6700'', didn't need the A/C much but the Honda did work the few times I needed it.

You didn't mention the brand and model of your TC, but if it has a genny compartment most will fit there. I don't have one for the TT so I leave the Honda on the ground securely chained with a motorcycle cable to the TT frame. Another word of caution: Honda handles are plastic and can be cut easily. They do sell an optional "theft resistant" cover for the handle and that's essential if you are going to secure it outside.

There are some restrictions, but it's generally true.

An example would be Sequoia National Forest. Dispersed camping is permitted except if you are in a designated recreation area. Then you must be in a campground. It makes sense because those recreation areas are in heavily used areas and you probably wouldn't want boondock there anyway. Those areas are clearly marked.

Sure. I normally offload if we'll be in the spot more than one day and haven't driven the car separately.

That said, you will run into campgrounds that specifically prohibit offloading. Examples that I am aware of are our County Parks here in San Diego and the Oasis RV park in Las Vegas.