RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Monaco Owner's Forum
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 04-22-2017, 08:49 PM   #1
Junior Member
 
Monaco Owners Club
Join Date: Aug 2015
Posts: 22
House Batteries charging question.

I have a Monaco 2004 Signature. When the motor is running should it charge the house batteries? Mine is not. If it is supposed to, what do I need to do? My generator will charge my house batteries but the engine does not.

Thanks in advance.
__________________

Okie pilot 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 04-22-2017, 08:55 PM   #2
Senior Member
 
Randyman1's Avatar


 
Monaco Owners Club
Join Date: Sep 2013
Location: Nebraska
Posts: 767
Sounds like you need to clean or replace your BigBoy solenoid in the rear run box. Mine was doing the same thing when I bought it three and a half years ago. I learned on this forum all about it and they were right. Bought mine new on eBay for around $160 I think.
__________________

__________________
Randy & Kathy-n-Auggie
07 HR Navigator 43PBQ, 525hp Cummins ISX, 17 Ford Supercrew Ecoboost King Ranch 4x4
Randyman1 is offline   Reply With Quote
Old 04-22-2017, 08:59 PM   #3
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,924
Typically, a battery isolation relay should connect both chassis and house batteries when a charging voltage (+13.4v) is detected. It should connect when alternator, shore power , or generator is providing power. Take voltage readings on both battery groups when unplugged, engine running, on shore power, and with generator running. This will tell you the status of the relay and if it's connecting. You could also check with the dashboard battery boost switch, which activates the battery isolation relay.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 04-22-2017, 09:06 PM   #4
Junior Member
 
Monaco Owners Club
Join Date: Aug 2015
Posts: 22
Quote:
Originally Posted by BFlinn181 View Post
Typically, a battery isolation relay should connect both chassis and house batteries when a charging voltage (+13.4v) is detected. It should connect when alternator, shore power , or generator is providing power. Take voltage readings on both battery groups when unplugged, engine running, on shore power, and with generator running. This will tell you the status of the relay and if it's connecting. You could also check with the dashboard battery boost switch, which activates the battery isolation relay.
How do you check with the boost switch. Thanks for your help
Okie pilot is offline   Reply With Quote
Old 04-22-2017, 09:08 PM   #5
Junior Member
 
Monaco Owners Club
Join Date: Aug 2015
Posts: 22
Quote:
Originally Posted by Randyman1 View Post
Sounds like you need to clean or replace your BigBoy solenoid in the rear run box. Mine was doing the same thing when I bought it three and a half years ago. I learned on this forum all about it and they were right. Bought mine new on eBay for around $160 I think.
Thanks I'll do some checking when I get home.
Okie pilot is offline   Reply With Quote
Old 04-22-2017, 09:38 PM   #6
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,924
Quote:
Originally Posted by Okie pilot View Post
How do you check with the boost switch. Thanks for your help
Seeing a voltage increase on both battery groups when the engine or shore cord is connected. The relay also has terminals you can check with a meter to see if it's connecting or not. If everything is quiet, have someone press boost switch on the dash while you listen at the relay to hear it click.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 04-22-2017, 09:45 PM   #7
Senior Member
 
Scottybdivin's Avatar


 
Newmar Owners Club
Join Date: Jun 2012
Location: Spicewood Texas (West of Austin)
Posts: 4,341
I was having the same problem. I briefly pressed the boost switch and it started working properly. You can tell if it is working by the voltage on your inverter's remote. The voltage will go from 12.? up to 13.4+. Kind of reminds me of the time we used to tap on a starter solenoid to get it unstuck.
__________________
Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Trojan T-105's
2019 F250 King Ranch 4x4 Powerstroke
Roadmaster Blackhawk 2, RVI2 Brake System
Scottybdivin is offline   Reply With Quote
Old 04-22-2017, 09:48 PM   #8
Senior Member
 
Outbound's Avatar
 
Join Date: Jun 2012
Location: NorCal
Posts: 1,634
I just replaced my battery isolator, had 14.3 volts in (center terminal) from alternator and only 14.3 volts out on one terminal to motor batteries, should have same volts going out to house batteries, easy fix.

Outbound
2002 Monaco Executive
Outbound is offline   Reply With Quote
Old 04-22-2017, 10:02 PM   #9
Senior Member
 
distaff's Avatar
 
Join Date: Dec 2009
Posts: 1,817
Lots written this, but let's summarize the basic symptoms:
  • Are the house batteries charged by the alternator (you have answered this as no)?
  • Are the starter batteries being charged by the generator/shore power?
  • Does the boost switch cause the two 12V systems to connect (do the voltages equalize when it is pressed)?
  • Are the batteries and the connections to them in good condition?

There are several different systems that can all misbehave:
  • There is the BIRD system that controls the relay by monitoring the voltage levels on the two 12V systems - pretty sure the '04 Sig had the BIRD system
  • There is a very inexpensive relay that connects the output from the BIRD system and the Boost Switch to the relay
  • There is the relay itself - the "BigBoy" - it can get dirty inside and stop transmitting power and it can burn out (usually from holding down the Boost Switch)
  • The inverter can cause issues - mine was settling to a voltage on "float charging" that was not adequate to trigger the BIRD system so on shore power so the starter batteries would drain.

If you answer the first questions we can help point you at one of the second systems to look for the problem.
__________________
Paul
2006 Patriot Thunder C13 Allison 4000
2010 Ford Flex Ecoboost AWD
distaff is offline   Reply With Quote
Old 04-24-2017, 05:35 AM   #10
Junior Member
 
Monaco Owners Club
Join Date: Aug 2015
Posts: 22
Quote:
Originally Posted by distaff View Post
Lots written this, but let's summarize the basic symptoms:
  • Are the house batteries charged by the alternator (you have answered this as no)?
  • Are the starter batteries being charged by the generator/shore power?
  • Does the boost switch cause the two 12V systems to connect (do the voltages equalize when it is pressed)?
  • Are the batteries and the connections to them in good condition?

There are several different systems that can all misbehave:
  • There is the BIRD system that controls the relay by monitoring the voltage levels on the two 12V systems - pretty sure the '04 Sig had the BIRD system
  • There is a very inexpensive relay that connects the output from the BIRD system and the Boost Switch to the relay
  • There is the relay itself - the "BigBoy" - it can get dirty inside and stop transmitting power and it can burn out (usually from holding down the Boost Switch)
  • The inverter can cause issues - mine was settling to a voltage on "float charging" that was not adequate to trigger the BIRD system so on shore power so the starter batteries would drain.

If you answer the first questions we can help point you at one of the second systems to look for the problem.
House Batteries are not being charged by the alternator.
I don't know if the start Batteries are being charged by shore and or generator.
I have never used the boost switch.
I bought 4 new batteries last July so all connections are good.

Sorry I am not much help. Had the motor home about 1 1/2 years. I have almost all the bugs worked out and have learned a bunch about it but just realized it probably should keep the house batteries charged after a long drive. Just been using shore, gererator, and solar to do so. But would really help on quick 1 nighters not to run gererator.

Thanks you for your help.
Okie pilot is offline   Reply With Quote
Old 04-24-2017, 05:52 AM   #11
YC1
Senior Member
 
YC1's Avatar


 
Holiday Rambler Owners Club
Join Date: Jun 2011
Posts: 7,530
Welcome to the forum.

This is a very common issue and there is tons of stuff on it. I am not trying to brush you off but here is a link to some of it. If you type the word BIRD in the little google box above and to the right it will take you to the following page.

I am an electronic geek so enjoy learning the variations of the setups. Someone will come along with your exact model and know where the "Big Boy" is located. Many can be repaired and some are just better replaced.

https://www.google.com/search?q=bird...earch=irv2.com
__________________
Myron & Deborah
08 HR Endeavor 40 SKQ
2012 Ford Edge Limited FWD 3.5L
Aluminator tow bar, Demco base plate
YC1 is offline   Reply With Quote
Old 04-24-2017, 07:20 AM   #12
Senior Member
 
Randyman1's Avatar


 
Monaco Owners Club
Join Date: Sep 2013
Location: Nebraska
Posts: 767
OkiePilot, if you have never done anything with your big boy solenoid, I guarantee you that is your problem just get one. It's a maintenance item that nobody ever does anything with so you are probably due for one.
__________________
Randy & Kathy-n-Auggie
07 HR Navigator 43PBQ, 525hp Cummins ISX, 17 Ford Supercrew Ecoboost King Ranch 4x4
Randyman1 is offline   Reply With Quote
Old 04-24-2017, 08:28 AM   #13
Senior Member
 
distaff's Avatar
 
Join Date: Dec 2009
Posts: 1,817
Okiepilot - do you own a multi-meter? If you don't you will either have to buy one and learn how to use it, or get a repair tech to work on it. No two ways around this one. A multi-meter is your friend if you own a motorhome.
__________________
Paul
2006 Patriot Thunder C13 Allison 4000
2010 Ford Flex Ecoboost AWD
distaff is offline   Reply With Quote
Old 04-24-2017, 04:50 PM   #14
Senior Member
 
Outbound's Avatar
 
Join Date: Jun 2012
Location: NorCal
Posts: 1,634
Photo's of 2002 Monaco Exec big boy compartment with layout print, not sure if yours resembles photos, this may help.

Outbound
2002 Monaco Executive
__________________

Outbound is offline   Reply With Quote
Reply

Tags
batteries, charging, house batteries



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
House Batteries Not Charging while driving? UPDATED 3/15/06 Old Snipe Winnebago Industries Owner's Forum 15 04-28-2017 09:29 AM
Question on charging house batteries... tacotory Vintage RV's 11 08-15-2012 04:34 PM
House batteries aren't charging. Joe Brunold Alpine Coach Owner's Forum 9 01-03-2009 09:28 AM
A question regarding charging house batteries JWatkins Winnebago Industries Owner's Forum 31 02-11-2008 03:42 PM
Charging House Batteries ichn2go Winnebago Industries Owner's Forum 6 02-03-2006 02:10 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 10:26 PM.


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