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M450 (Unique Issues) If you have a unique issue with your M450 model coach and it can't be answered in one of the other forums here, then this is where you can list it.....list your M450 Parts here too. NO DISCUSSION OF ANY OF THE M450 LAWSUITS ALLOWED HERE.

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Old 07-16-2013
jsonday6294 jsonday6294 is offline
Join Date: Dec 2011
Location: Nashville
Posts: 42
Default Guest charger

I just looked at my charger and one side is connected to my engine batt. and the other to my 8 series house batt. Is this how they should be tied in?

John Sonday
Nashville, Tennessee
2007 Lxi 450
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Old 07-16-2013
nbedinger's Avatar
nbedinger nbedinger is offline
Goat rails in the sunset
Join Date: Jul 2012
Location: Freewheelin'
Posts: 1,805

Hey John--

That's a new one on me, but you have a 24V (2-12V in series) like discussed above,, right? Are you sure the 8 batts are in series? What voltage is just one of them? I'm hoping to learn something about 48V coaches, sounds like maybe you have one.

Edit: Ooops, Ed's a few after this clarified that it is not 48V. Beg your pardon!

Ned Bedinger
1991 SP36
BB Body No. 93327
Full-time in 2019

Last edited by nbedinger; 07-17-2013 at 12:16 AM.
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Old 07-16-2013
b1gsur b1gsur is offline
Senior Member
Join Date: Sep 2009
Location: San Marcos
Posts: 435

Originally Posted by jsonday6294 View Post
I actually have a Guest 2730, which is two 15 amp chargers.
I have 2-15A also, but I was under the under the understanding that the inverters did not charge the starting batteries.
Dan & Cindy Sunderland
2005 450 LXi
Toad 2016 F150 4WD Lariat Super Crew
San Marcos, CA

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Old 07-16-2013
Ed Wimberley's Avatar
Ed Wimberley Ed Wimberley is offline
95 WB 42
Join Date: Aug 2008
Location: Perry Georgia
Posts: 2,924

I have only assisted in replacing 1 full set 10 batteries on an M450.2006
It has 3 shelfs 3 on top 3 in middle and 4 on bottom shelf
Top right battery is one of the engine batteries
Center shelf right hand is other engine battery,they are series hooked to be 24 vdc for engine starting they are hooked to the guest charger mounted on door 12volt to each one.
All batteries are 12volt
The top shelf center and left battery ,,,,center shelf ,center and left battery and all 4 on lowest shelf are house batteries. Some are connected in series for the 24vdc systems there is also pick off points for 12vdc system requirements.
There is a very good wiring diagram on the door it shows all battery positions how it's wired and voltages present at different points.
There is another battery strickly for the generatorstarting only mounted up behind passenger side headlight 12vdc it has a separate charger in 1st bay drivers side.
Generator slide power comes from house batteries not the generator battery.

1995 WB 42 Series 60
Perry Georgia
770-548-1441 cell
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Old 07-17-2013
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G_man G_man is offline
Senior Member
Join Date: Jan 2008
Location: Litchfield
Posts: 786

To add to Ed's fine description; you may find that the generator battery was moved when the recall/generator move was done. Mine is now in bay 3, curbside. Also the connectors on your batteries are color coded. 24 volt = green. 12 volt = red. The guest charger should have a 12 vdc output going to each of the starting batteries and those two batteries should be connected in series. Locating them is as easy as reading Ed's description!
Rich D. Former Owner; '90 PT40, '99LXi43 & '06 M450 LXi (CT)
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Old 07-19-2013
G_man's Avatar
G_man G_man is offline
Senior Member
Join Date: Jan 2008
Location: Litchfield
Posts: 786


This is a copy of my decal located in the main DC distribution panel. That should clarify the battery banks/groupings.
Attached Files
File Type: pdf Battery Bay Decal.pdf (702.6 KB, 155 views)
Rich D. Former Owner; '90 PT40, '99LXi43 & '06 M450 LXi (CT)
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Old 08-03-2016
JohnLombardozzi JohnLombardozzi is offline
Junior Member
Join Date: Dec 2013
Location: Herndon
Posts: 12

Originally Posted by dentmac View Post
Hi. the charger that you replaced. What batteries was it charging.? Just the 2 star
ting ?

can you give me a call when you are free. I have an M450 2005 (Originally owned by MiJack) I have done extensive work on the Coach. I would like to visit with you about some upgrades I want to make.

email: johnl@signaturecos.com or cell phone 571-233-9341
John Lombardozzi
Herndon, Va
2005 Lxi 450
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