Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
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 08-20-2012, 06:56 PM   #1
Junior Member
Join Date: Feb 2012
Posts: 1
Total loss of power after startup

Does anyone know if a malfunctioning BiDirectional Isolator Relay Delay will cause the motorhome to lose all power when generator attempts to take over the coach power? This problem is intermittent and has got me baffled.

I started the motorhome up from a cold start and after a few minutes I cranked up the generator for it's monthly cycling. When the generator got up to speed and attempted to take over powering the coach the entire power system shut down. The coach was dead electrically. The only thing that functioned was the power step.

I measured power out of the continuous duty solenoid and discovered one side was 12v and the other measured 5 - 7v. After waiting a couple of minutes I measured the voltage again on the solenoid and found 12v out of both sides. I was able to start the coach and ran it up to operating temp. Started up the generator and cycled all electrical systems with no other issues.

Is there a troubleshooting procedure anyone would be willing to share to isolate this phantom and fix it so I won't worry about the sudden loss of power going down the road?

Pmclean2nd 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 08-21-2012, 06:50 PM   #2
Moderator Emeritus
Gary RVRoamer's Avatar

Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 16,443
The only relationship between the isolator and the generator is that both need 12v to operate. It sounds as though starting the generator dropped the battery voltage enough so that the you lost all 12v power and it didn't recover until the generator had run awhile, thus powering the charging system.
Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer 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

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:19 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.