Troubleshooting Electric Nash 22H
Hi Everyone, my name is Kevin and I'm new to the RV world; picked up a 2004 22H Nash trailer a few weeks ago. I'm unable to get anything to run off of the battery when I'm not plugged in to shore powe...
Forum Discussion
Both the Converter running off shore power or generator and the DC battery connections feed the 12VDC Power Distribution Point where all of the 12VDC Fuses are located. This then allows the converter to be a battery charger when on shore power and keeps your batteries charged up when you are connected to shore power or generator.
Being a 2004 model you have no idea what has been changed by the previous owner(s)...
Using a inexpensive DC voltmeter for Harbor freight or any of the auto parts stores you should be able to disconnect from shore power or generator and just follow the 12VDC voltage from the battery terminals to where they connect to the +BAT connection on the 12VDC Power distribution panel.
A fully charged battery will read 12.6-7VDC and when it is being charged by the converter unit when it is plugged into shore power or generator will then jump up to 13.6VDC on your older trailer that is probably still using a single DC voltage older type converter unit.
If you don't see this increase in DC voltage when on shore power at the battery terminals then you are disconnected somewhere.
There should be a DC FUSE real close to the battery probably in the 35AMP rating and then near the converter connection you should see two high amps fuses off to them self labeled REVERSE POLARITY... All three of these should blow if the battery is REVERSED CONNECTED protecting your battery cables from overheating and cause a fire.
A quick test of course is your 12V ceiling lights should work from your batteries when unhooked from shore power or generator.
I would look at the 12V battery terminals and find the word 'NEG' or the symbol '-' stamped on the battery case and hand follow that terminal connection to make sure it is the one that goes to FRAME GROUND real close to the battery install position.
I test my battery terminals every time we stop at a campground connection and make sure I see the increase in Battery DC Voltage when we hookup to shore power. This tells us right away we are fully connected between the trailer converter circuit and the batteries terminals and the battery is being charged like it is suppose to be doing.
All of this is not complicated and you should know what to look for as part of your generator maintenance observations with your new to you trailer.
Lets us all know what you find out...
Roy Ken
Being a 2004 model you have no idea what has been changed by the previous owner(s)...
Using a inexpensive DC voltmeter for Harbor freight or any of the auto parts stores you should be able to disconnect from shore power or generator and just follow the 12VDC voltage from the battery terminals to where they connect to the +BAT connection on the 12VDC Power distribution panel.
A fully charged battery will read 12.6-7VDC and when it is being charged by the converter unit when it is plugged into shore power or generator will then jump up to 13.6VDC on your older trailer that is probably still using a single DC voltage older type converter unit.
If you don't see this increase in DC voltage when on shore power at the battery terminals then you are disconnected somewhere.
There should be a DC FUSE real close to the battery probably in the 35AMP rating and then near the converter connection you should see two high amps fuses off to them self labeled REVERSE POLARITY... All three of these should blow if the battery is REVERSED CONNECTED protecting your battery cables from overheating and cause a fire.
A quick test of course is your 12V ceiling lights should work from your batteries when unhooked from shore power or generator.
I would look at the 12V battery terminals and find the word 'NEG' or the symbol '-' stamped on the battery case and hand follow that terminal connection to make sure it is the one that goes to FRAME GROUND real close to the battery install position.
I test my battery terminals every time we stop at a campground connection and make sure I see the increase in Battery DC Voltage when we hookup to shore power. This tells us right away we are fully connected between the trailer converter circuit and the batteries terminals and the battery is being charged like it is suppose to be doing.
All of this is not complicated and you should know what to look for as part of your generator maintenance observations with your new to you trailer.
Lets us all know what you find out...
Roy Ken
