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06-12-2013, 09:25 PM
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#1
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Senior Member
National RV Owners Club
Join Date: Dec 2010
Location: Spring Hill, Florida
Posts: 854
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Unusual Electrical Issue
Ours is a 2005 National Dolphin. It has 2 - 6v house batteries, 1 -12 chassis battery, xantrex invertor and a 7000 watt Onan Gold generator.
It stays hooked up to a 15 amp circuit on the side of the house when we're not taking it out. Battery terminals are clean and tight. Battery electrolyte levels are good. Voltage reading on chassis is a squeak over 13 volts, house batteries are a squeak over 6.2 volts.
Getting ready for a weekend camping trip today, I pulled it from the side of the house. I disconnected the power and all the other things. About 13 minutes later I got in it, started it up and pulled out of the side yard.
Parked it in front of the house and proceeded with sanitizing the fresh water tank and some other routine things. Ran the pump a little bit and opened and closed the door and steps a few times as I was going through my activities.
Went to drive it around the neighborhood after about 30 minutes to slosh the sanitizing solution and the engine wouldn't turn over and the steps extended very slowly. Used the boost switch and it still wouldn't turn the engine over. Primed the generator and it started right up. Ran it for 15 minutes, turned it off and the engine started up fine. Steps extended and retracted normally too.
Can't find my battery hydrometer, so I can't verify specific gravity of electrolyte.
Really odd occurrence. Looking for suggestions for the next thing to check out. Thanks in advance for any helpful replies.
__________________
Harley Ultra Classic (Geezer Glide) Rider, Retired US Army Paratrooper, fisherman, shooter. Proud to have served, proud of those that still do, or have done so with pride.
2005 National Dolphin 34'
[SIGPIC][/SIGPIC]
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06-12-2013, 09:36 PM
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#2
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Senior Member
Freightliner Owners Club
Join Date: Apr 2007
Posts: 432
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Wolfpack You say you have 2-6volts they should be wired in series and be about 12.6 volts not 6 volts so I would start looking at the battery wiring or one of the 6 volts is realy bad.
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2001 Horizon 2004 jeep GC
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06-12-2013, 10:25 PM
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#3
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Senior Member
National RV Owners Club
Join Date: Dec 2010
Location: Spring Hill, Florida
Posts: 854
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They're wired in series and they were connected when I metered them. I tested with the meter probes against the terminals of each battery individually.
Should I have gotten 12v+ with that test method?
__________________
Harley Ultra Classic (Geezer Glide) Rider, Retired US Army Paratrooper, fisherman, shooter. Proud to have served, proud of those that still do, or have done so with pride.
2005 National Dolphin 34'
[SIGPIC][/SIGPIC]
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06-12-2013, 11:11 PM
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#4
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Senior Member
National RV Owners Club Workhorse Chassis Owner
Join Date: Feb 2011
Location: Covington, GA
Posts: 785
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If you measured from pole-to-pole on each house batteries it should read 6+ volts for each battery, but across the series connection it should be 12+ (~13)v, or about the same as the chassis battery.
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J.J. Hayden (KN4SH)
Covington, GA
2005 National Dolphin 5342
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06-12-2013, 11:12 PM
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#5
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Senior Member
Freightliner Owners Club
Join Date: Apr 2007
Posts: 432
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Check the voltage of the 2 6v together they should be around 12.6v . Sounds like the starting batteries are running down. Check the voltage after they set for an hour or so not being charged.
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2001 Horizon 2004 jeep GC
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06-13-2013, 07:15 AM
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#6
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Senior Member
Join Date: Nov 2007
Location: somewhere in the west
Posts: 1,168
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You need new Batts.
Ed
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06-13-2013, 08:48 AM
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#7
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Oct 2008
Location: Merritt, BC
Posts: 3,753
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If these are by any chance the original batteries that came with the coach, I would say they're due for replacement.
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Bob, Sherron & Kinsey (RIP 2013-2022)
2017 Tiffin Phaeton 40QBH
2014 Jeep Cherokee Limited
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06-13-2013, 08:00 PM
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#8
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Posts: 1,121
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Have your chassis battery load tested and check the connections. The steps and engine starter use the chassis battery.
__________________
John, Pam, and Aria
NKK 16073L
2015 London Aire
2015 GMC Seirra
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06-13-2013, 09:51 PM
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#9
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Senior Member
National RV Owners Club
Join Date: Dec 2010
Location: Spring Hill, Florida
Posts: 854
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So it wasn't such an unusual issue after all. And I kinda feel like a dummy . Dearly departed chassis battery. You are dead and today we lay you to rest
Picked up a new one today everything is copasetic.
Things I learned.
1. Steps run off of chassis battery.
2. Plugged into house, batteries stay charged nicely.
3. Generator starts off of house batteries.
4. Generator charges all batteries when it's running.
5. And last but not least. There's good folks in the world and a whole bunch of them are right here on iRV2!
Thank you all for your replies and suggestions! I absolutely love the iRV2 community and the culture that exists in this forum. It's a culture similar to the that of the company I work for. When you love where you work and love the people you work with and those that work for you, then you come home and get to experience it again in a social media outlet like this, it's just GREAT.
__________________
Harley Ultra Classic (Geezer Glide) Rider, Retired US Army Paratrooper, fisherman, shooter. Proud to have served, proud of those that still do, or have done so with pride.
2005 National Dolphin 34'
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06-14-2013, 10:25 AM
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#10
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,678
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A couple other lessons from this:
(1) A squeak over 13 volts is not a good reading on a 12v battery.Freshly charged, or with the charger active, it should read 13.3-13.6v.
(2) 6.2v is not a real great reading for a 6v either - should be at least 6.3 with no charger connected and 6.65-6.8 if connected to a functioning charger (shore power or generator running).
A 100% charge is 2.1 volts/cell (3 cells on a 6v and 6cells on a 12v). That is measured with the battery at rest (no charger) and after the "surface charge" from the charger has dissipated. The surface charge from a recent or active charging brings the normal voltage to 2.2-2.3 volts/cell.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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06-14-2013, 10:56 AM
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#11
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,442
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Now you have good batteries have you connected to shoreline again and checked to see if the engine battery is getting charged ? Some RV's do not charge both banks when on shoreline. Simple devices to handle the situation. I just don't want you to kill your new battery.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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06-17-2013, 05:27 AM
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#12
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Senior Member
National RV Owners Club
Join Date: Dec 2010
Location: Spring Hill, Florida
Posts: 854
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Quote:
Originally Posted by YC1
Now you have good batteries have you connected to shoreline again and checked to see if the engine battery is getting charged ? Some RV's do not charge both banks when on shoreline. Simple devices to handle the situation. I just don't want you to kill your new battery.
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Thanks! Yeah we're good to go now. Both batteries getting their charge on house hook up.
__________________
Harley Ultra Classic (Geezer Glide) Rider, Retired US Army Paratrooper, fisherman, shooter. Proud to have served, proud of those that still do, or have done so with pride.
2005 National Dolphin 34'
[SIGPIC][/SIGPIC]
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06-17-2013, 10:33 AM
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#13
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Senior Member
Join Date: Sep 2010
Location: MI
Posts: 1,094
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A battery tender type charger extends the life of a battery. Use one on each of our motorcycles. Our new coach has a float/tender type charger. It has eight batteries. Eight! So, I'll be checking the electrolyte levels regularly. And, then when we need new ones? Holey moley!
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06-18-2013, 12:58 PM
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#14
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,518
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I bought and installed Battery Life Savers (about $100/ea.), also known as a desulfator. They reverse sulferization which is a big destroyer of batteries. They will also restore a weak/old battery.
__________________
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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