No 12v power

[901JB]

Just bought a 96 grand manor Thor 3470 I have no 12v power to the the 12v side like the lights when I’m not on shore power or generator running but I have power for the slide out and the power step and the frig out side lights are on , just put 2 new batteries in it last night , any ideas to what I need to check for

[Chateau_Nomad]

Check for blown fuses in your power center box.

[901JB]

Iv checked all the fuse and breakers

[Pete'sMH]

There is a big in line resettable circuit breaker somewhere near the batteries. Did you locate it and make sure it’s set?

[901JB]

Not one , Iv have chase wires all day yesterday and today, 12v side of braker panel doesn’t have power

[dkoldman]

Do you have BEFORE & AFTER pictures of how you wired your new batteries?

Can you turn your inverter on?

If your 12v Buss is not hot with like 12.8vdc you have miss-wired although the heavy duty fuse could be blown.

[901JB]

Main cables that are hooked to battery one power for the hydro jacks and one looks like it runs up to the front under the hood and 2 main grounds on the batterys and 2 circuit breakers like this on 2 smaller wires, one wire works the steps and other wire I haven’t fig out what it’s powering

[901JB]

It didn’t have battery’s in it when I bought the motor home last week, some stole them when it was packed at the storage lot , they tried stealing the cats off it to but found out after cutting off the “cat” that they cut the muffler off not the cat because it’s a 96 it didn’t have them on it

[dkoldman]

Pictures, it will allow others to help.

If your buss bar does not have 12vdc, it ought to be easy to identify. Should be heavy gauged red wire from battery bank to the block inside the 12vdc breaker panel. Another wire usually black that connects to the buss bar.

[901JB]

I’ll get pic in the morning

[abjbrtd]

Do you have a volt meter and know how to read the voltage on a string of batteries

[901JB]

Originally Posted by abjbrtd

Do you have a volt meter and know how to read the voltage on a string of batteries

Yes I do

[901JB]

Few pictures of the battery compartment

[901JB]

So from top to bottom on the pictures ,1st top pic is the Circuit breakers that work the power steps and can hear the frig igniter clicking 2nd pic the 2 smaller black wires in the pos+ go to the circuit breakers and the big main wire on it gos up to the front under the hood 3rd pic is of the leveling pump hooked up main ground- and main pos+ on just the one battery for now 4th is just a over all view of everything

[dkoldman]

Just at a glance it does not look like it is wired properly to me? I assume both batteries are House batteries, and if so I don't see how they are wired in parallel? Good pictures, but one showing both batteries where you see the wires may have helped. Yes you need to know where they go, but if it were me, I would clean it all up and then focus on getting both batteries in parallel properly. Verify that you have the 12 volts across both batteries.

You may not have the cables you need? I am attaching a picture of mine in hopes it helps as a reference. If you can get a similar picture it may help, sorry about being a clean freak, but I wash and wax damn near everything that will not rust from water. It is hard for me to tell which cables are positive or negative in your pictures.

Good luck

[fourthgear]

You need to sort what is ( + ) Positive & what is ( - ) Negative , Looks like a lot of Black & One heavy gage red in Sheathing . Those small auto reset Breakers & the way they look wired , just doesn't look right , but with out seeing a lot more & Meter Testing to see what is what & who goes where , can be fun, take one circuit at a time & some start from the beginning of the source of Power & some start at what is not working at the working end , both work & both can be quick to find the answer or a lot of testing .

If any of those Black Wires should be Red in color , it would be helpful to change them now & later .

[901JB]

Originally Posted by dkoldman

Just at a glance it does not look like it is wired properly to me? I assume both batteries are House batteries, and if so I don't see how they are wired in parallel? Good pictures, but one showing both batteries where you see the wires may have helped. Yes you need to know where they go, but if it were me, I would clean it all up and then focus on getting both batteries in parallel properly. Verify that you have the 12 volts across both batteries.

You may not have the cables you need? I am attaching a picture of mine in hopes it helps as a reference. If you can get a similar picture it may help, sorry about being a clean freak, but I wash and wax damn near everything that will not rust from water. It is hard for me to tell which cables are positive or negative in your pictures.

Good luck

Yes house battery and no they are not in parallel yet Walmart mart was out of cables to hook them together, so I just have one on the leveling system and one on the house 12v,

[901JB]

Originally Posted by fourthgear

You need to sort what is ( + ) Positive & what is ( - ) Negative , Looks like a lot of Black & One heavy gage red in Sheathing . Those small auto reset Breakers & the way they look wired , just doesn't look right , but with out seeing a lot more & Meter Testing to see what is what & who goes where , can be fun, take one circuit at a time & some start from the beginning of the source of Power & some start at what is not working at the working end , both work & both can be quick to find the answer or a lot of testing .

If any of those Black Wires should be Red in color , it would be helpful to change them now & later .

It has 2 heavy gauge reds and 2 heavy gauge blacks and the 2 smaller wires that goes to the circuit breakers

[901JB]

I’m assuming this is the battery isolator for the charging side from the chassis battery and alternator

[901JB]

Welp my Ol lady figured it out , there was a main switch under the dash on the left of the steering wheel