Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
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 10-28-2021, 11:32 AM   #1
Junior Member
Join Date: Mar 2016
Posts: 9
Battery isolater

just returned from a trip and had two issues. First problem, we dry camped for three days and when we were ready to leave the chassis batteries were to low to start the coach. The second time dry camping for same period of time I turned the switch to the chassis batteries off, same result. Also sometimes when driving the low alternator warning comes on with 12.4 to 12.5 reading especially while under load, then settles in at 12.8 to 13.1. This seems to be totally random and will return to normal . 2001 DSDP with cat 3126.
coach32765 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! 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 10-28-2021, 11:44 AM   #2
Senior Member
Join Date: Oct 2014
Posts: 4,165
With "random" changes in voltage, first check is all connections:

At batteries.

Chassis ground.

Back of alternator.
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
wolfe10 is online now   Reply With Quote
Old 10-28-2021, 12:00 PM   #3
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 24,961
2001 DS with Cat . I'll assume Freightliner chassis and the OEM Leece-Neville 160 amp alternator .

Have you had the chassis batteries load tested ??
I just had my L/N bearings replaced and during the bench testing the shop noticed the regulator was defective ( not allowing full output. )

So the alternator mounted regulator is a possibility .

I'll add to Brett's list of connections to check .
The charge wire from the alternator , does not run directly to the chassis batteries , it connects to the battery cable at the starter . So the connection there has to be clean and tight too .
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 10-30-2021, 05:09 PM   #4
Senior Member
Join Date: Aug 2021
Location: Louisville, KY
Posts: 114
I had a skid-steerer, had starting issues with it. Replace the cable from the battery to the starter and this fixed the problem. Cut the insulation off the old cable and the copper wires where corroded, green in color. Might need to replace some cables.
2020 Kountry Star 3412, 2021 Gladitor w/ Soft Topper, 1970 Jeep CJ5 ( Restoring)
Steve70-5 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
Bounder: 1996 Bounder isolater relay . stepside454 Fleetwood Owner's Forum 6 11-11-2019 03:23 AM
Batter Isolater/Control Module, 2013 Challenger KT Rascal55 Class A Motorhome Discussions 1 07-03-2015 12:28 PM
Battery isolater help please 85 Pace Arrow ideagirl Vintage RV's 11 07-22-2012 08:46 PM
Chassis Battery Isolater Fuse Dave&Kacy Alpine Coach Owner's Forum 5 10-20-2008 12:20 PM
Battery Isolater Location? ktnhog Winnebago Industries Owner's Forum 5 08-15-2008 02:55 PM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 07:40 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.