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Old 09-16-2018, 08:21 AM   #1
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Chassis Battery Voltage

Good morning all.
A little background. 2005 Dolphin 5376, W24. A few months ago my Chassis Battery exploded while I was trying to start the engine. It was a 5 old year old battery. After all the clean up and new battery installed, everything works and I can assume for this moment nothing was damaged.
This morning I checked the battery voltage at the control panel. House Batteries 13.7v Chassis 11.7v.
I checked voltage at the Interconnect Solenoid and get 13.7 out of each pole. One going to the coach batteries and the other, the chassis.
When starting the engine, the dash displays 14.7volts.
The control center reports 13.7 house and 14.7 chassis.
I would think that I should have darn near the same volts between chassis and house when just on shore power and engine off.
Clues, suggestions?

As an addendum:

The first attempt to start the engine that day, the battery appeared dead.
I then pressed the "Emergency Start" button on the dash and tried again to start it. It was then that the battery blew up.
Is there a relay or fuse that the "Emergency Start" button is connected to?
I checked all the fuses under the top dash panel and are all good.
I'm about to install a battery tender to keep the chassis battery topped of as the only time, currently, the chassis battery is being charged is with the engine running.
Help is greatly appreciated
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Old 09-16-2018, 12:45 PM   #2
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Wow I'll bet that was a mess to clean up!! Do you remember what brand of battery it was that blew up?

Can't help you on what the voltages should be.
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Old 09-16-2018, 12:57 PM   #3
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From the info in your post it looks like the alternator isn't charging the coach batteries either.

Engine running ; chassis battery 14.7 , coach 13.7. They should be the same there too.

Is the interconnect solenoid/relay in a BCC ? ( Battery Control Center )

Could you post a picture of it's location ?
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Old 09-16-2018, 06:22 PM   #4
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Rick I’ll check mine while running and give you a call while doing so maybe tomorrow or Tuesday.
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Old 09-17-2018, 06:36 AM   #5
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Quote:
Originally Posted by Arch Hoagland View Post
Wow I'll bet that was a mess to clean up!! Do you remember what brand of battery it was that blew up?

Can't help you on what the voltages should be.
We were on the road and I had to stop at WalMart for a replacement.
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Old 09-17-2018, 06:39 AM   #6
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Quote:
Originally Posted by Skip426 View Post
From the info in your post it looks like the alternator isn't charging the coach batteries either.

Engine running ; chassis battery 14.7 , coach 13.7. They should be the same there too.

Is the interconnect solenoid/relay in a BCC ? ( Battery Control Center )

Could you post a picture of it's location ?
The alternator charges both sides of the system. If I run it long enough they both balance.

The BCC to the right of the interconnect. It has 6 black boxes, and a bigger black box. (breakers) on it. If you reach behind each little box you'll find a reset button
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Old 09-17-2018, 06:40 AM   #7
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The Battery Tender has been on since noon Sunday the 16th. Today were are at 13.7, both sides and the tender is in green mode.
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