Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 04-21-2020, 02:29 PM   #1
Junior Member
 
Brand: Thor Motor Coach
Model: Ace
State: New Jersey
Posts: 4
THOR #18631
Unhappy fully charged batteries stop working

Everything OK. Batteries fully charged and working fine. Go out one morning, and RV won't start and display shows batteries half charged. Put meter on batteries, show full charge. Plug into shore power, engine starts. Everything ok for several weeks. Happens a 2nd time. Plug in shore power, engine starts. Everything fine today. Not sure where to look to find problem. have Thor Ace 27.2

__________________
rutom3 is offline   Reply With Quote
Old 04-21-2020, 03:03 PM   #2
Senior Member
 
Brand: Keystone
Model: Sprinter
State: Florida
Posts: 1,422
THOR #15553
Are you turning off the Battery Disconnect Switch while in storage? Do you have a light on is some closet or compartment? There also is paracidic draws on the batteries. CO dect, LP dect, Radio etc.
__________________
2011 Keystone Sprinter 323BHS. Retired Master Electrician. All Motor Homes are RV's. All RV's are not Motor Homes.
cavie is offline   Reply With Quote
Old 04-21-2020, 03:25 PM   #3
Senior Member
 
Brand: Thor Motor Coach
Model: 37LS outlaw
State: New Jersey
Posts: 516
THOR #5248
Can you start the rig by holding the emergency start switch?

Sounds like the chassis battery is dying. On shore power the bird is charging the chassis battery which lets you start the rig.
__________________
Trkyte@msn.com is offline   Reply With Quote
Old 04-21-2020, 06:28 PM   #4
Senior Member
 
MJC62's Avatar
 
Brand: Thor Motor Coach
Model: A.C.E. 27.2
State: Indiana
Posts: 1,842
THOR #14698
Quote:
Originally Posted by Trkyte@msn.com View Post
Can you start the rig by holding the emergency start switch?

Sounds like the chassis battery is dying. On shore power the bird is charging the chassis battery which lets you start the rig.
Second the basis battery going bad. Our 2018 27.2 needed a new battery summer 2019.
__________________
2018 ACE 27.2
Toad 2019 Jeep Cherokee Trailhawk
Roadmaster Falcon All Terrain Towbar
Roadmaster Invisibrake
MJC62 is offline   Reply With Quote
Old 04-21-2020, 09:30 PM   #5
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 4,157
THOR #6411
The house batteries lasted three seasons but the chassis battery lasted 30 months. I thought the step was going bad because the coach is always on shore power and the engine started OK. Before a trip I check the chassis water level and found one cell had water below the top of the plates (bad cell). With a new battery, the step again worked as it should.
__________________
Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
Beau388 is offline   Reply With Quote
Old 04-22-2020, 08:10 PM   #6
Junior Member
 
Brand: Thor Motor Coach
Model: Ace
State: New Jersey
Posts: 4
THOR #18631
Quote:
Originally Posted by Trkyte@msn.com View Post
Can you start the rig by holding the emergency start switch?

Sounds like the chassis battery is dying. On shore power the bird is charging the chassis battery which lets you start the rig.
Could not start on emergency start. Started after shore power on for 5 mins or so. Started every day since as well with no shore power. Seems like some switch or relay cutting out because house batteries were fully charged when I put meter to them. Not sure where to look.
__________________
rutom3 is offline   Reply With Quote
Old 05-06-2020, 07:46 PM   #7
Member
 
Brand: Thor Motor Coach
State: Iowa
Posts: 48
THOR #9915
Batteries

Did you check the terminals. Loose or corroded terminals will act like that.
__________________
DonB is offline   Reply With Quote
Old 05-06-2020, 08:02 PM   #8
Junior Member
 
Brand: Still Looking
State: Kentucky
Posts: 13
THOR #18544
https://www.thorforums.com/forums/f8/fully-charged-batteries-stop-working-21375.html

Are you checking the batteries with a multimeter or are you doing a battery draw test which shows you CA of your battery. Your battery may show you good battery voltage and not have the CA to turn the vehicle over!
__________________
packrfan2001@yahoo.com is offline   Reply With Quote
Old 05-07-2020, 12:05 AM   #9
Member
 
Brand: Thor Motor Coach
State: California
Posts: 48
THOR #15490
When you say your meter shows full charge what does that mean to you.. a battery with just 12v is dead... also did you load test them batteries may be able to hold voltage but without being able to push the amperage they are useless.
__________________
CampTap is offline   Reply With Quote
Old 05-07-2020, 12:24 AM   #10
Site Team
 
16ACE27's Avatar
 
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,116
THOR #7035
And what batteries are you testing? The house batteries don't start the engine, the chassis battery does.

If your house batteries are well charged you should be able to push the Emergency start button for about a minute and then attempt to start the rig with the Emergency start button still depressed even if the chassis battery is too low to start the rig.
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
16ACE27 is offline   Reply With Quote
Reply

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 09:24 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2