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Battery light came on today


Poohbear
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Hi everyone wanted to see if anyone has experienced this situation. I have a 2004 Monaco signature that I just bought first of this year. One day I cranked it up to move and the battery light came on in the dash but I had shore power plugged up so I unplugged it and the light went out. We just came back from a trip this weekend and this is the first trip that I needed to run generator to run ac. So when I fired it up all was fine but when I cranked the genny that same light came on and stayed on for about a 50 mile trip. I thought the alternator on the engine was giving up the ghost. But I noticed that the voltage was 13.8 volts so I thought maybe the house genny was keeping them charged. So on the trip back today when I started big engine no light when I started the house genny and it kicked in light came back on. I let it idle till I hooked up the toad and was waiting on my son to dump his camper I’d say 15 20 min the light went back off and stayed off all the way back. What could cause this? Does it have a warning to let you know you are still hooked up to shore power and somehow it does it with genny too? Just don’t want to get stranded if it needs fixing need to do it now.

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Did you test the start batteries? At the battery terminal 's

 

Did you test tge House Batteries?

At the batteries terminal.

 

With the engine Off

Generator Off

Unplugged to shore power 

 

See what volts you get 

Did you test the start batteries? At the battery terminal 's

 

Did you test test House Batteries?

At the batteries terminal.

 

With the engine Off

Generator Off

Unplugged to shore power 

 

See what volts you get 

2 minutes ago, John Haggard said:

Did you test the start batteries? At the battery terminal 's

 

Did you test tge House Batteries?

At the batteries terminal.

 

With the engine Off

Generator Off

Unplugged to shore power 

 

See what volts you get 

Did you test the start batteries? At the battery terminal 's

 

Did you test test House Batteries?

At the batteries terminal.

 

With the engine Off

Generator Off

Unplugged to shore power 

 

See what volts you get 

Welcome Ronny

That's a wonderful coach to have

Post a picture for us

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8 hours ago, vito.a said:

It's normal for the Alternator Fail light (battery symbol) to come on when there are other charging sources. 

Just turn your headlights on and the warning light will go out.  

Well I did notice that when I pushed the brake it would go out but as soon as I released it it would come back on. Also my headlights have been changed to led ones and don’t know if they would have much of a draw? Also all of my batteries are only 6 months old but I haven’t checked voltage but haven’t had any issues with cranking or any house related voltage issues.

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11 hours ago, John Haggard said:

Did you test the start batteries? At the battery terminal 's

 

Did you test tge House Batteries?

At the batteries terminal.

 

With the engine Off

Generator Off

Unplugged to shore power 

 

See what volts you get 

Did you test the start batteries? At the battery terminal 's

 

Did you test test House Batteries?

At the batteries terminal.

 

With the engine Off

Generator Off

Unplugged to shore power 

 

See what volts you get 

Welcome Ronny

That's a wonderful coach to have

Post a picture for us

 

F7CC0401-06F6-4861-B194-3F19DE11E3BC.jpeg

737A66CA-7CB4-4482-952B-FC5E51746736.jpeg

1 minute ago, Poohbear said:

 

F7CC0401-06F6-4861-B194-3F19DE11E3BC.jpeg

737A66CA-7CB4-4482-952B-FC5E51746736.jpeg

This is the only pics I have so far

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4 hours ago, Ivylog said:

As Vito said ^^^ it’s normal for the light to come on when you have 2 charging sources.

Yes I understand but the audible warning along with the light is painful to the ears. I’ll try turning lights on next time and see if this will quiet it.

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