which plug circuit is which?

[Bobbie54]

The 15 amp fuses on my 17b (2020) say furnace and something? (Don't knoww hat that is) and 12v (the one that is out) and then two say lights. anyone know which lights go with which/ I need 12v but don't need furnace or all the lights.

[Jim Bennett]

If you don't need anything on the 12V circuits just don't turn it on. It is always good to keep power on all the circuits for when you do need it. No different from 120V at home or in the trailer.

[Centex]

In spite of (or perhaps because of) the 'labels' affixed by ETI, it can be quite informative to go through your fuse and breaker panels, pulling / turning off each in turn, and noting what fixtures, appliances, etc are associated with each protection device (what 'goes dead' when a fuse / breaker is removed / turned off).

If nothing else the effort at home base could well expedite troubleshooting in the field.

Here's the product of that reasonably quick systematic exercise done in the relaxed comfort of my driveway shortly after I acquired my 5.0 (which revealed that the ETI labels were loaded with errors and omissions). YMMV:

[Bobbie54]

What I needed was the 12 V but my friend had a spare fuse and she wasn’t using her 12 V so I’m going to get a new spare for her a new spare for me and a replacement for me but I could’ve just turned off the furnace if I didn’t want hot water, furnace is off actually as we are on 110 but I didn’t have a charger for the 110 I needed to recharge USB stuff. All good now

[Bobbie54]

Not sure why it went out but I’m thinking since we had two people here for the first time we just had too many things plugged in at once