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 06-19-2017, 10:29 PM   #1
Senior Member
 
VanDiemen23's Avatar
 
Join Date: Oct 2010
Posts: 1,105
Odd electrical problem

I have a Cat 3126E in a 99 Beaver. Coming home today the voltage gauge suddenly dropped from 12 to below 10, and the trip computer re-set. Tach went crazy too. Got out the meter and with all major electrical off, both coach and chases batteries were over 13V. Turn on the lights, wipers, or AC and it dropped to 10-ish.

No obvious problems from the trans or engine ECUs, although at one point the trans display got pretty dim.

Found the positives on one of the chassis batteries and one of the coach batteries were slightly loose, but tightening them made no difference.

Wipers were most affected, as they would freeze in mid stroke until the power came up to 12 again, and as soon as they started to move it would drop back to 10. took more than an hour for them to return to the park position.

On the switch from 12 to 10 and back it was abrupt, like a relay switching. Eventually it stayed at 10. Had a harrowing last 40 minutes back to home in the dark, with my wife driving the toad in front for guidance and safety and me with no lights other than the markers. I was worried that if the voltage dropped too low the engine electronics would abruptly stop working and leave us stranded someplace with no shoulder.

Anybody run into this before? Alternator or voltage regulator failure?
__________________

VanDiemen23 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 06-19-2017, 10:40 PM   #2
Senior Member
 
bluepill's Avatar
 
Join Date: Jan 2011
Location: Pensacola, FL
Posts: 2,448
May be a poor connection in either the power or the ground side. Best to do a voltage drop test on both while the symptoms are present.

Google will give you lots of links if you are not familiar with this basic test.

One example here:

http://www.aa1car.com/library/voltage_drop_testing.htm
__________________

__________________
2008 Itasca 37H
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months
Yellowstone Lake 6-1-2012
bluepill is offline   Reply With Quote
Old 06-20-2017, 10:31 AM   #3
Junior Member
 
Join Date: Dec 2016
Posts: 18
I think it's the alternator
BlueCyborg is offline   Reply With Quote
Old 06-20-2017, 09:16 PM   #4
Senior Member
 
Join Date: Sep 2016
Posts: 610
If you can get under it, check the battery cables at the starter. It sounds like one of them may be loose.
AITG is offline   Reply With Quote
Reply

Tags
electrical



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
Odd electrical problem, ideas? wardy Tiffin Owner's Forum 22 05-03-2013 11:22 AM
Very odd electrical issue gtbiv1 Travel Trailer Discussion 14 05-26-2012 09:16 PM
Odd Bay Star electrical wiring joes2901 Newmar Owner's Forum 2 04-27-2012 07:27 AM
Odd electrical question Sludge Winnebago Industries Owner's Forum 5 04-23-2012 12:16 PM
odd electrical problems - 99 Beaver Monterey VanDiemen23 Class A Motorhome Discussions 22 07-18-2011 04:09 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:28 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×