Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 09-16-2014, 03:45 PM   #1
Junior Member
Triple E Owners Club
Join Date: Nov 2011
Location: Whitehorse YT
Posts: 12
Headlights: strength and excessive draw

Just purchased an older DP that in most respects is wonderful and nominal in performance. The only glitch has to do with headlights and any suggestions would be much appreciated.

1. headlight beam - the headlights (sealed beams) are relatively new and yet their effectiveness is marginal after the sun sets. In fact, the day-time running lights appear more powerful as far as illumination than the regular headlights as well as high beam setting. Any experience with headlights that I should know about to address this issue?

2. when the headlights are turned on the voltmeter takes a significant hit as indicated by the needle leaving the center position and dropping to the approximate 1/4 level ... still within the "normal" designation of the meter. Before the headlights are turned on, the mere use of the turn signal causes the volt meter to fluctuate with each blink of the turn signal.

In addition, even without the headlights or any other draw on the system, the volt meter indicator registers a gradual erosion from mid-normal to lower and lower normal ... I've always stopped before the needle enters the red zone (not normal).

Sure would appreciate any advice or recommendations.
Thanks in advance

Triple E 3126 Cat DP

Durabil 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 09-16-2014, 04:03 PM   #2
RVM#87 / Senior Member
DieselTech39's Avatar

Solo Rvers Club
Join Date: Jul 2014
Location: Ham Lake, MN
Posts: 2,849
First I would check all the grounds on the batteries and repair as necessary.

Or, it could be the voltage regulator in the alternator needs repair. IMO take the alternator to a reliable automotive electric repair shop and have them test it. If not working correctly and unless you feel mechanically inclined to do it yourself, have them rebuild it.

Have a wonderful day!
Ken (RVM 87)
FT DP Wanna B The journey is the destination!
Retired & perfecting procrastination!
DieselTech39 is offline   Reply With Quote
Old 09-16-2014, 04:06 PM   #3
Senior Member
Ford Super Duty Owner
Join Date: Feb 2011
Posts: 133
The first area I would look is wiring connections with special attention paid to grounds. At the same time check for conductor condition. The symptoms point to an unwanted series load which usually happens in the grounding circuit. Good luck.
Peterd503 is offline   Reply With Quote
Old 09-17-2014, 12:04 PM   #4
Senior Member
falconman's Avatar

Join Date: Apr 2008
Location: On the Road
Posts: 625
Everything you want to know about headlights;
Daniel Stern Lighting Consultancy and Supply
Email him, very responsive/ helpful
Dan & Arlene
2005 Monaco Dynasty Diamond IV
Chasing the good weather
falconman is offline   Reply With Quote
Old 09-17-2014, 01:23 PM   #5
Senior Member
jauguston's Avatar
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
Poor headlight performance with motorhomes is not unusual. There is often long runs of too small gauge wire and poor grounds.

First thing to do is take your digital multi meter (Don't have one-get one-they are cheap and everyone should have one) and do this test. With the motor running check the voltage across your chassis batteries with the lights on. Now do the same thing at the plug that goes into the headlight with the headlight plugged in and on. Compare the numbers you get. If there is a big voltage drop you have found the trouble.

A good fix is a aftermarket relay kit that runs heavy wire from the batteries to the headlights and uses the original headlight power wires to simply activate the relays. If your chassis batteries are in the back find a heavy gauge wire in front to use.
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston 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 05:57 AM.

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