Ammeter to Voltmeter...who does it?

Mattax said
Probably worth figuring out if this is standard practice and if so, why. A fuse or breaker, especially one thats 20 amps or less, between two batteries or between the alternator and the battery just seems odd.

So I was completely talking out of my fourth point of contact about that fused wire....it isn't, and I'm surprised because I thought I knew this chassis cab inside and out. What I thought was a fuse holder is actually just a factory connector.

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Mattax said
Ammeters aren't on or off. It's the same as having a short piece of wire in the same location. If you go to the Chrysler MTSC page I linked, you'll see the ammeter consists a big plate with a connector on each end. A high resistance fine circuit is attached in parallel. When current moves through the plate, the needle in the fine circuit deflects.

I misspoke. What I should have said was that current passes through the ammeter at all times, whether the motorhome is running or not.

Mattax said
Voltmeters are a through path with a very high resistance. The resistance limits flow through the meter to a tiny amount, but its there. It would be a slow drain on the battery.

So I would definitely need to find a switched source, to avoid battery drain.

Mattax said
AMC used the switched side of the fuse box on late SJs for the voltmeter lead. Not sure if it was fused on not, probably yes. I'm sure some folks earlier in this thread have discussed locations to tap.

I don't know that I'll be able to use a switched source from the fuse block, like AMC had (I own a '76 CJ-5, so I know what you're talking about). This is the fuse block on the chassis cab.

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Mattax said
Interesting. Maybe it has a big resistor in it (load test).

The Coach/House battery has a wire that runs to the 100A Charger/Converter which, in turn, is wired to the Power Distribution Center, so the resistor is probably in the Charger/Converter, because I don't remember seeing one in the Power Distribution Center.