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Old 10-04-2018, 07:37 AM   #1
PaulMears
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Default House battery does not charge enroute

After about 4 hours in-route my house battery runs down, the radio will not work, and I cannot start the generator to charge it.


If I jump start the generator, the house battery charges. Once hooked up at an RV site, the house battery charges correctly.

Is their a combiner or solenoid that connects the Chassis and Coach battery system? Where do I look for these components?


Got an suggestions?

Paul Mears
36' 2005 Cresendo
350 Cat, 2 bump outs
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Old 10-05-2018, 08:10 AM   #2
Big Shasta
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Same coach as you. I assume the alternator is supposed to top off the house batteries. What are you running off them in route? if there is too much drain, maybe the alternator can't keep up.

They aren't connected except for the fact that if the main is to low to start the engine, then the dash battery rocker switch is supposed to link the house batteries to start the main engine but I don't think it works the other way.

We usually have folks with us and run the generator while we're enroute...The inverter was removed from mine when I got it and it's Florida so we need the ACs.
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Old 10-26-2018, 12:16 AM   #3
PaulMears
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Default Coach battery not charging enroute

Where is this battery rocker switch on the dash?

I cleaned the connections on all of the solenoids and circuit breakers and batteries.

Next I will check the voltage on the batteries, solenoids, and circuit breakers to see if I can find the problem.

When shore power is connected or generator is running the house batteries charge.

I only have the refrig running when enroute.
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Old 11-26-2018, 10:49 AM   #4
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Originally Posted by PaulMears View Post
Where is this battery rocker switch on the dash?

I cleaned the connections on all of the solenoids and circuit breakers and batteries.

Next I will check the voltage on the batteries, solenoids, and circuit breakers to see if I can find the problem.

When shore power is connected or generator is running the house batteries charge.

I only have the refrig running when enroute.
We are having the same issue in our 2004 Friendship G7. The alternator has always charged the house batteries when in route, but we recently started to have an issue. I'm hoping to find a wiring diagram so I can determine which solenoid could be bad. It definitely worked before as we have driven over 60K miles since 2006.
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Old 11-26-2018, 11:25 AM   #5
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We are having the same issue in our 2004 Friendship G7. The alternator has always charged the house batteries when in route, but we recently started to have an issue. I'm hoping to find a wiring diagram so I can determine which solenoid could be bad. It definitely worked before as we have driven over 60K miles since 2006.
Push the emergency start rocker switch on the dash and listen for the click. If it doesn't click then you know you have a problem with the solenoid. Sometimes even if it does click you can have a problem with the solenoid.
It should also click the same solenoid when you turn on the key. That makes it so your house batteries charge while you are running the engine.
To find the solenoid I have one clue, this one is usually the one with the yellow wire running to it. Good luck.
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Old 11-26-2018, 12:29 PM   #6
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Push the emergency start rocker switch on the dash and listen for the click. If it doesn't click then you know you have a problem with the solenoid. Sometimes even if it does click you can have a problem with the solenoid.
It should also click the same solenoid when you turn on the key. That makes it so your house batteries charge while you are running the engine.
To find the solenoid I have one clue, this one is usually the one with the yellow wire running to it. Good luck.
Do this while engine running or before it's running? Also, while connected to shore power or disconnected? Thanks for your quick reply. Much appreciated.
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Old 11-26-2018, 03:28 PM   #7
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Not running and disconnected.
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Old 11-27-2018, 05:32 AM   #8
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Originally Posted by Restorium View Post
Push the emergency start rocker switch on the dash and listen for the click. If it doesn't click then you know you have a problem with the solenoid. Sometimes even if it does click you can have a problem with the solenoid.
It should also click the same solenoid when you turn on the key. That makes it so your house batteries charge while you are running the engine.
To find the solenoid I have one clue, this one is usually the one with the yellow wire running to it. Good luck.
Couldn't one also disconnect the chassis batteries and then see if there is power to the starter when pressing the rocker switch? I'm wondering if you will always be able to hear the solenoid, I don't hear anything and now it makes me wonder if my aux start switch would work when needed.
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Old 11-27-2018, 07:25 AM   #9
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This might help;
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Old 11-27-2018, 09:52 AM   #10
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Couldn't one also disconnect the chassis batteries and then see if there is power to the starter when pressing the rocker switch? I'm wondering if you will always be able to hear the solenoid, I don't hear anything and now it makes me wonder if my aux start switch would work when needed.
On my motorhome the yellow wire was cut. I figure that the previous owner worried that somehow the engine battery was going to get killed by the coach circuit so they made sure it wouldn't by cutting the yellow wire. My solenoid wasn't clicking when we bought it. The rocker switch on the dash could easily get pushed and keep the two systems connected on a stay and then all the batteries could go dead leaving the coach stranded. My switch is not 'momentary', it can stay on.
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