RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 07-28-2018, 06:47 PM   #1
Junior Member
 
Join Date: Jul 2018
Posts: 4
Charging Issue with Class A Motorhome

Hello
I have a 98 6.5 that has charging issues.
I have 2 alternators that both run up like new on the bench.(1 of them is new)
I have power from the ignition to the regulator plug
And back from the starter.
Batteries all at full charge even replaced the regulator plug end thinking it maybe to loose.
Has its own ground wire to the mount.
All of this and many tries and still no out put from alternator!!!!!!
If anyone has any idea what to look at next I would be greatful

Thank you
Desert Wings 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 07-28-2018, 07:31 PM   #2
Senior Member
 
Join Date: Jul 2014
Posts: 24,795
Can't quite figure out what vehicle your talking about but if its a 1998 Motor Home, the alternator output may be connected to a diode isolator. From there it splits the charging to both sets of batteries.

If they burn out a diode, no current passes thru.
The alt output goes to the center terminal and each battery bank is on each side.

Jump from center to either side to bypass it and see if it charges.
Click image for larger version

Name:	48161.jpeg
Views:	56
Size:	43.4 KB
ID:	212837
twinboat is offline   Reply With Quote
Old 07-28-2018, 07:41 PM   #3
Junior Member
 
Join Date: Jul 2018
Posts: 4
Yes class A motor home.
Can’t even get to the diode phase.
No power from positive post of alternator.
I have power to the regulator from ignition and starter but no out put at all.
Desert Wings is offline   Reply With Quote
Old 07-28-2018, 08:47 PM   #4
Senior Member
 
Join Date: Jul 2014
Posts: 24,795
Quote:
Originally Posted by Desert Wings View Post
Yes class A motor home.
Canít even get to the diode phase.
No power from positive post of alternator.
I have power to the regulator from ignition and starter but no out put at all.
Jump the isolator, if you have one, and see if it charges. You may have a self exciting alternator and it needs 12 volts at the output post.
twinboat is offline   Reply With Quote
Old 07-28-2018, 08:51 PM   #5
Junior Member
 
Join Date: Jul 2018
Posts: 4
Thx I will try that and let you know
Thx
Desert Wings is offline   Reply With Quote
Old 07-29-2018, 01:15 AM   #6
Senior Member
 
Clomok's Avatar
 
Join Date: Jan 2017
Posts: 508
On your isolator, the alternator and chassis battery NEED to be on the same terminal you could also (highly recommend) go to a one wire alternator and ditch the regular
__________________
2012 RAM 3500 dually
06 ragen 3506 BH
Clomok is offline   Reply With Quote
Old 07-29-2018, 01:24 AM   #7
Senior Member
 
vsheetz's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 14,932
Does this alternator need external excitation? If so should have a small wire going to the alternator that has 12v from the ignition key being in on position. If no 12v there will be no output from the alternator. Check for a inline fuse. .
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is offline   Reply With Quote
Old 07-29-2018, 02:07 AM   #8
Senior Member
 
Isaac-1's Avatar
 
Join Date: Jun 2016
Location: SW Louisiana
Posts: 5,289
My bet would be no power on the exciter wire, maybe blown fuse, do your dash lights light up? I think they are on the same fuse as the exciter wire on my coach.
__________________
2002 Safari Trek 2830 on P32 Chassis with 8.1L
Isaac-1 is offline   Reply With Quote
Old 07-29-2018, 06:37 AM   #9
Member
 
Join Date: Feb 2011
Location: milford va
Posts: 94
Read the posts,don't see any mention of the connection of the positive output wire on back of alternator.Does it have battery voltage.On the plug,one wire goes to the positive ,other to the light in dash to excite the field.This is what I remember,
ronster is offline   Reply With Quote
Old 07-29-2018, 11:25 AM   #10
Senior Member/RVM #90
 
MSHappyCampers's Avatar


 
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 43,870
Hi ! Welcome to IRV2! We're sure glad you joined the gang!

You lost me for sure!

Good luck, happy trails, and God bless!
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is offline   Reply With Quote
Old 07-30-2018, 09:30 PM   #11
Junior Member
 
Join Date: Jul 2018
Posts: 4
Thx to all

Thank you to all with your input into my long term frustration with this problem.
There were many factors involved including a brand new faulty alternator that was bench tested 2 times by the store that sold it to me!!!!
Problem solved Fiimely .

A trick that I learned long ago the if you take screw driver and place it on the back bearing cover and it sticks itís making a charge. No stick no charge???
So lesson for the parts guy telling that it was good.
Once again thx for the help and the hospitality.😎
Desert Wings is offline   Reply With Quote
Old 07-31-2018, 12:28 AM   #12
Senior Member
 
cimplexsound's Avatar
 
Join Date: Aug 2013
Posts: 893
You might have a charging cable disconnected at the battery. I have found this to be a common problem. Check all battery cables. Make sure none are damaged, cut or missing.
cimplexsound is offline   Reply With Quote
Reply



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
Used class A motorhome vs used class C kerrjon3 iRV2.com General Discussion 15 10-16-2017 07:34 PM
1983 Coachman Class RV Battery Charging Issue Demidion Vintage RV's 5 09-25-2016 01:15 PM
do i have a A class or C class motorhome vschweiger MH-General Discussions & Problems 4 01-29-2013 08:04 AM
Southwind 36D Issue after issue after issue.... fixn2gocamp Fleetwood Owner's Forum 4 10-21-2009 08:05 PM


All times are GMT -6. The time now is 03:56 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.