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.
  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 06-13-2011, 05:53 PM   #1
Senior Member
Go Dawgs's Avatar
Join Date: Mar 2011
Location: Kent, WA
Posts: 1,062
Coach Battery goes dead on drive

I have an 87 Allergo Bay MH with a 454 P30. Last weekend we took a 3 hour trip to the campground on Friday and came back on Sunday. On the way back we had to pull over for an overheating issue (taking to mechanic on Wednesday for that) and when we stopped at a Flying J the engine wouldn't start (coach battery was dead). Now the battery had a full charge when we left and I had no issues starting on Sunday morning.

My question is: Could I have a bad alternator? I put a charge on it when I got home and it started up fine.

Thanks as always

2017 Grand Design Reflection 303 RLS
2004 Ford F350 Lariat 4x4 Dually
Go Dawgs 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 06-13-2011, 07:05 PM   #2
Moderator Emeritus
Gary RVRoamer's Avatar

Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,632
A bad alternator would be one likely cause, but that could include a loose or broken drive belt for the alternator.

If you measure the battery voltage with the engine running, it should be 13.6v or more if the alternator is putting out any charge at all. However, there is a mode of failure (diode failure) in which the alternator puts out standard voltage but very little charging current, maybe only 2-3 amps. Your coach will use more than that when driving, so the battery goes dead after awhile. You will need a professional alternator test to test for that problem. Most any auto parts store can do ti for you - usually free.
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer 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
Chasis Battery Dead While Connected to Shore Power adlerx Monaco Owner's Forum 7 03-05-2011 07:54 PM
Coach battery question! Help Please! Lkraus3 Vintage RV's 9 02-14-2011 09:43 AM
Dead battery Mr.Steve MH-General Discussions & Problems 15 03-13-2008 02:34 PM
Dead Chassie Battery Blue Ribbon MH-General Discussions & Problems 5 02-01-2007 01:34 AM
Coach battery drained - anyone know how this could've happened? NLOVNIT MH-General Discussions & Problems 7 06-28-2006 10:15 AM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:14 AM.

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