Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 07-09-2016, 01:48 PM   #1
oildriller83's Avatar
Fleetwood Owners Club
Join Date: May 2014
Location: Rogers, Arkansas
Posts: 38
Electrical Issues

We've had our 97 Pace Arrow Vision for three years now. No real issues other than problems I've created.....until last weekend. We took it out for the second time this year, and the batteries died on the first day, while plugged into shore power. The coach batteries never showed charging (didn't have a volt meter on me, had to go by display over stove) on shore power or generator (while running the gen, I honestly didn't give it much time). The kicker, when I would start the engine, the alternator would immediately brighten the lights and start charging the system.

After returning home, I was convinced my 110v-12dvc inverter was bad. So, I tear into everything and pull it out. Before ordering a new one, I got the bright idea to test it. Out showed 13.8dcv coming out. I've hooked everything back up and now on shore or gen power, the inverter still shows 13.4dcv (everything running that can be to pull a load) at the inverter and 12.9dcv off the batteries....is this about the right volts, any ideas what's going on?

James & Jessica + weenie dog and a big cat
1997 Pace Arrow Vision 35'
oildriller83 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-09-2016, 05:08 PM   #2
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 11,954
Could you post some info from the unit you removed and tested .
Make , model and amp rating. Should be a sticker on it.
I believe, from the year of your coach, that it will only be a converter/charger , not an inverter .
Output from the C/C at 13.8 v sounds ok , some would go as high as 14.2 then cycle down to 13.1 for maintenance of the batteries state of charge.
13.4 under load is probably ok but that depends on the units rating in amps.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 07-09-2016, 05:52 PM   #3
oildriller83's Avatar
Fleetwood Owners Club
Join Date: May 2014
Location: Rogers, Arkansas
Posts: 38
I'll have to get the info off the sticker, the 13.4 under load I believe is perfect, but the batteries are showing 12.9 under load as well.....is that three reading they're supposed to have while being charged?
James & Jessica + weenie dog and a big cat
1997 Pace Arrow Vision 35'
oildriller83 is offline   Reply With Quote
Old 07-09-2016, 05:54 PM   #4
oildriller83's Avatar
Fleetwood Owners Club
Join Date: May 2014
Location: Rogers, Arkansas
Posts: 38
I have this currently on my phone. The output is perfect according to the stickers. I just can't figure out why the batteries went dead and wouldn't charge without the motor/alternator running
Attached Thumbnails
Click image for larger version

Name:	1468108398930.jpg
Views:	32
Size:	65.0 KB
ID:	132539  
James & Jessica + weenie dog and a big cat
1997 Pace Arrow Vision 35'
oildriller83 is offline   Reply With Quote
Old 07-10-2016, 05:47 PM   #5
Senior Member
Join Date: Jun 2016
Location: Nine Mile Falls WA / Arizona City AZ
Posts: 315
First... an inverter changes 12VDC to 120VAC while a converter changes 120VAC to 12VDC....

In most cases a motor coach has a master control system... it gives the gen set priority when it starts and runs... and when the gen set is off... allows the unit to be powered by shore power.... once the master control system gives one device or the other the priority than the converter is powered up and the batteries are charged..

If you find that with either shore power, or on the gen set... you have the 13.8v out of the converter than these circuits are working correctly... one more thought... the alternator runs to a set of diodes.... one set sends power to the chassis batteries, and the other set runs power to the coach batteries... these diodes are called isolation diodes and are usually close to the alternator and the size of this device is based on the output of the alternator... this system is always separate and always functions unless the alternator is not functioning...

So if we go back to the 13.8vdc out of the converter.... between this converter and the coach batteries... is a master fuse... on my converter its IN THE CONVERTER... on my old unit it was a large fuse in the area of the coach batteries and tied in at that location... based on the output rating of the converter... the fuse protects that system... thus a 40 amp converter might have a 50 amp fuse... some systems have (2) large fuses in parallel....

SO I ASSUME both your gen set and shore power, will power up the converter... and it has output... follow the output wires from the device to the batteries.... you'll discover the fuse..
jelag is offline   Reply With Quote
Old 07-10-2016, 09:33 PM   #6
Fleetwood Owners Club
Workhorse Chassis Owner
Ford Super Duty Owner
Join Date: Jul 2013
Location: Central Florida
Posts: 52
Maybe time for new batteries?

If your coach batteries are more than 4-5 yrs old with the symptoms you are explaining and converter is testing fine your batteries may be toast. I ran into this a few months back. While camping with 50 AMP service the 12V lighting would occasionally flicker and dim, then get better. And you could tell vent fans rpm were also off of normal. My charge monitor was dropping down to 11volts so I also initially thought converter was culprit. Long story short, I eventually figured out that the 2 coach batteries would not carry enough load any longer so even plugged into 115volts the cells were bad enough they weren't transferring full voltage any more. The previous owner of my rig had replaced batteries so I knew they were at least 4 yrs old. Once replaced all problems solved. I know they are a pain to get to, but see if your local auto parts store can load test your batteries if you bring them in? My two cents worth! Good Luck!

2010 Fleetwood Bounder 35H Workhorse
Prev: 2001 Damon Intruder (Model 351) V-10 Ford
"The older I get, the better I was!!
mus289 is offline   Reply With Quote


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
120 Electrical Issues Hebegb RV Systems & Appliances 6 12-07-2007 04:55 PM
Slide-out Electrical Issues Rick Stevens Travel Trailer Discussion 6 05-17-2007 12:28 PM
In-Motion satelite system -electrical issues campernut2 MH-General Discussions & Problems 10 04-17-2007 02:16 AM
Slide-out Electrical Issues New Member Check-In 6 12-31-1969 07:00 PM
120 Electrical Issues New Member Check-In 6 12-31-1969 07:00 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:31 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.