Good Sam Club Open Roads Forum: Tech Issues: Coach battery bank not working
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Coach battery bank not working

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next
juano

San Diego

New Member

Joined: 09/09/2021

View Profile


Offline
Posted: 10/20/21 01:21am Link  |  Quote  |  Print  |  Notify Moderator

Hi,

Fulltimer with a wife and 2 years old baby trying to troubleshoot an electrical issue for almost a week without luck, need to be able to run furnace and the rest of the equipment as its getting really wet and cold here in the mountains of Northern California.

Got a 1995 Bounder and loving it, original 6v Interstate batteries were from 2005 so totally dead, replaced them with brand new 6v Interstate deep cycle connected in series as the original. Starter battery replaced too.

After 3 days coach batteries died.

Alternator or shore power by charger/converter not able to recharge coach battery bank. I got a big wheel Napa battery charger and recharge them to 12.8v.
If I'm running engine I've 12v power but few minutes after I shut it off I lost all 12v power after a relay click. Looks like coach battery bank is not being recognized by the system.
I already cleaned the two grounds from each bank at the chassis until I got shiny metal, nothing changed.

With the engine off if I click both battery disconnect switches I can hear a click, but maybe I should go further and check it with my meter, any guidelines of how to proceed step by step? I'll take notes and update the post as requested.

My electrical skills are not great but I've 2 multimeters available, voltimeter light, wires, and the whole day to take readings and hopefully fix this annoying issue.


Thanks you!

wa8yxm

Davison Michigan (East of Flint)

Senior Member

Joined: 07/04/2006

View Profile


Offline
Posted: 10/20/21 06:38am Link  |  Quote  |  Print  |  Notify Moderator

"After 3 days the batteries died"
I assume you mean the house batteries
Bad converter is my guess. but
Make and model of converter please
Converters have fuses.. could be that simple


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


juano

San Diego

New Member

Joined: 09/09/2021

View Profile


Offline
Posted: 10/20/21 10:25am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

"After 3 days the batteries died"
I assume you mean the house batteries
Bad converter is my guess. but
Make and model of converter please
Converters have fuses.. could be that simple


Yes, I mean house batteries.

I already checked my inteli 9000 converter fuses and both are fine, also input is reading 120v with 13.3v of output.

At the same time I don't think the input it's my problem as alternator is not being able to recharge my coach battery bank neither.

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 10/20/21 10:27am Link  |  Quote  |  Print  |  Notify Moderator

Some newer converters have reverse polarity fuses on the 12 volt output terminal area.
12 volt distribution panel have a fuse in it from the converter on some.
Verify 120 volt AC input to the converter. Check 120 volt AC circuit breakers.


Bud
USAF Retired
Pace Arrow

2003 Chev Ice Road Tracker


BFL13

Victoria, BC

Senior Member

Joined: 02/15/2006

View Profile



Posted: 10/20/21 11:41am Link  |  Quote  |  Print  |  Notify Moderator

When plugged in and you see 13.3v at the converter output, you should also have about 13.3v at the battery posts. If only 12v there, check your "battery fuse" or DC circuit breaker near the batts somewhere. If it is open, the alternator charging won't reach the batteries either.

However, if your batts die after running things for a while, that means that battery fuse is ok since the 12v from the batts can get to the lights and fans etc. Some other "open" would be between the converter and the battery bank.

You are getting 12v in the house with alternator running so it is not the DC CB by the isolator, but could be the DC CB at the other end of the wire from the isolator near the batteries (which might be in addition to the "battery fuse")

Some MH have some of this in a compartment next to the battery location instead of at the engine battery and house battery locations. I don't have that so others can help there--also with whatever a BIRD is, if it is not the same thing.

You need the PD booster control if not fitted so you can put 14.4v to those 6s to charge them properly.

* This post was edited 10/20/21 11:48am by BFL13 *


1. 1991 Oakland 28DB Class C
on Ford E350-460-7.5 Gas EFI
Photo in Profile
2. 1991 Bighorn 9.5ft Truck Camper on 2003 Chev 2500HD 6.0 Gas
See Profile for Electronic set-ups for 1. and 2.

juano

San Diego

New Member

Joined: 09/09/2021

View Profile


Offline
Posted: 10/20/21 01:53pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks enblethen and BFL13 for the comments.

Before I pass to converter/charger testing I need to know why my coach battery bank is not being used by my house. So went from battery banks positive to BCC and found that I was getting full voltage from the chassis battery at the solenoid but only 3v on the coach battery bank.

This morning I decided to jump the automatic charging aux start relay (a.k.a. solenoid) to see if I can find some changes. Before I jumped it I took readings with my multimeter on each battery bank:

Chas bat 12.21v
Aux bat 12.68v


Using ground around the BCC and positives entering into it and connecting to solenoid I read:

Chas bat: 12.21v
Aux bat: 3v (??)


Then I proceed to disconnect everything and jumped the solenoid and measure again on solenoid sides:

Aux bat 12.18v
Chas bat 12.29v


I turned on 12v lights at the coach and I measured again after 5 minutes:

Chas bat 11.8v
Aux bat 12.68v


So it’s clear that my house is not using the power from the coach battery bank and draining the chassis battery.

So that's why I want to keep converter aside until I get this step solved.

MT BOB

Montana

Full Member

Joined: 03/02/2021

View Profile


Offline
Posted: 10/20/21 03:49pm Link  |  Quote  |  Print  |  Notify Moderator

Generally most coaches will not use chassis battery, but gets power from chassis when vehicle is running.
Just because a relay clicks does not mean it is good, the internals could be poor/bad.
Here is a basic 3 relay system,the "isolation" relay would be your emergency start relay.
I suspect a bad house battery relay,or it is not being turned on, or a bad positive connection somewhere from the house battery(s) to the relay.
[image]

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 10/20/21 04:57pm Link  |  Quote  |  Print  |  Notify Moderator

Look for a loose or dropped battery negative(ground)
Verify polarity

juano

San Diego

New Member

Joined: 09/09/2021

View Profile


Offline
Posted: 10/20/21 08:53pm Link  |  Quote  |  Print  |  Notify Moderator

I found my issue, a cleaned ground that apparently was not clean enough so testing conductivity through the chassis I got bad connection.

I'm happy to say that my brand new coach batteries are giving power to my house.

Now I'll need to figure out why after followed the troubleshooting guide positively my Inteli Power 9000 is not charging my batteries.

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 10/21/21 06:33am Link  |  Quote  |  Print  |  Notify Moderator

What is the exact model number of the converter? is it a 9100 or 9200?
Does it supply power when connected to shore power?

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next

Open Roads Forum  >  Tech Issues

 > Coach battery bank not working
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.