Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-18-2014, 09:34 PM   #1
Winnebago Camper
 
Join Date: Aug 2010
Posts: 19
Wiring Coach vs Engine batteries

I read a lot of the posts regarding Coach and Engine batteries. None touch on the problem I'm experiencing.

I just returned from a trip where I had to replace both coach batteries. While in the process I checked the voltage on the Engine batteries from the panel within the coach. Interestingly the Engine voltage reported on the COACH battery display - not Engine! Hmmm. I also noticed that my 12v systems would quickly discharge the batteries and since the Engine batteries don't charge from Ground Power I had to use a charger (yes, I use a disconnect switch when charging).

When I bought this coach (preowned) the batteries had been changed by the dealer. I had no reason to believe anything amiss. Now that I've had some failures I'm noticing anomalies.

I checked the Winnebago wiring diagrams but they're not real clear on what gets connected to which batteries. The Owner's Manual says ONLY the Engine and dash panel operate off the Engine battery. If so, why does my fridge show low DC voltage and my 12v lights dim and fans slow when the voltage on the Engine batteries runs low? I'm guessing something is not connected correctly.

On my 2 sets of batteries one has a rats nest of wires. These are currently the deep cycle batteries. The "normal" batteries only have 2 large positive and negative wires. Could it be the positive wires from one set of batteries was reversed with the other? Would it be as easy as disconnecting the Engine batteries and trying to start the motor to see if this is the case?

Your thoughts would be appreciated.
__________________
Larry & Phyllis
Santa Fe, NM
2003 Winne Journey DL
lpasekof is offline   Reply With Quote
Old 05-19-2014, 05:24 AM   #2
Winnebago Camper
 
Shadowcatche's Avatar
 
Join Date: Nov 2010
Posts: 26
A VOM/Multimeter will tell you which set of batteries are being charged by the engine alternator, or are not being charged. Simply check voltage at the battery(s) with the engine running and with it not. Quite frankly this is one of the arguments for using a batter monitor which will tell you the state of charge of both the starting batteries and the house batteries.
Shadowcatche is offline   Reply With Quote
Old 05-19-2014, 07:26 AM   #3
Winnie-Wise
 
Wizard's Avatar
 
Join Date: Mar 2007
Location: Home on the hill in Georgia
Posts: 296
Sounds like something could be wired wrong. Agree with above post, a good voltmeter is a must for checking electrical problems.

Contact Winnebago Customer relations, they can probably send a detailed wiring diagram. Winnebago Industries
__________________
Jerry & Patsy Potter, Taz & Jake Jr.
2000 Winnebago Journey
2006 Ford Explorer 4X4
[SIGPIC][/SIGPIC]
Wizard is offline   Reply With Quote
Old 05-19-2014, 07:27 AM   #4
Winnebago Owner
 
Triker56's Avatar
 
Join Date: Jun 2009
Posts: 107
Quote:
A VOM/Multimeter will tell you which set of batteries are being charged by the engine alternator, or are not being charged.
Same can be checked when on shore power.
Triker56 is offline   Reply With Quote
Old 05-19-2014, 07:01 PM   #5
Winnebago Master
 
Join Date: Dec 2005
Location: Buxton, North Dakota
Posts: 1,036
It would be better to measure the voltage while on shore power with the converter charging the house batteries. With the engine running both batteries should be receiving a charge and show the same voltage. It does sound like they are reversed. You could have a defective battery isolation solenoid, if so only the chassis battery will show the charge with the engine running.
__________________
2003 Winnebago Adventurer 38G F53/ V10 605 watts of Solar
1999 Winnebago Brave 35C Handicap Equipped
F53/V10
1999 Jeep Cherokee & 1991 Jeep Wrangler Renegade
John Hilley is offline   Reply With Quote
Old 05-19-2014, 07:17 PM   #6
Winnie-Wise
 
Skip426's Avatar
 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 339
If you think the positive cables have been crossed up, safest way to check this out would be to track from the starter to the battery bank. Yes I know it's a mass of black cables but grab a roll of red electrical tape and put a wrap around the cable as you go. I have taken to wrapping chassis positive wiring with red tape and coach positive with white, because I can't remember one time to the next which group of wires is which.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 05-20-2014, 06:48 AM   #7
Winnie-Wise
 
CaptBill's Avatar
 
Join Date: Aug 2002
Location: Indian River, De
Posts: 360
As advised, use a meter to determine which bank os being charged from shore power and engine alternator. And yes, you can simply disconnect one bank and then see if the engine starts from the other one (assuming you battery parallal solenoid is not stuck closed).

Engine alternator only charges engine batteries. Shore power only charges house batteries. That was one thing that bugged me when I first bought my coach, unless the dashboard battery parallel button is held in. I think Winnebago changed that arrangement on later model year coaches, but my 02, and I think your 03, are the same.

I replaced my parallel solenoid with a Blue Seas smart switch, so that low batteries first, then all batteries, are automatically charged from any source, whether it be shore power, engine alt, or generator.

BTW, Skip's suggestion is excellent.
__________________
CaptBill
USAF 1965-1971; USCG Master
2002 Horizon 36LD - 2000 GMC Sierra 1500 4x4
Indian River, De
CaptBill is offline   Reply With Quote
Reply

Tags
batteries, wiring


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing 12V coach batteries with 6V batteries Magumba Electrical | Charging, Solar and Electronics 27 12-05-2012 09:26 AM
Does all the wiring in the coach run off the coach batteries captgadget Electrical | Charging, Solar and Electronics 7 01-09-2012 03:45 PM
Coach batteries charging from main engine? Dave from MN Electrical | Charging, Solar and Electronics 12 11-02-2008 04:37 PM

» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:48 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.