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.
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 07-25-2019, 07:26 PM   #1
mre
Senior Member
 
Join Date: May 2006
Posts: 912
Alternator Failure (I Think)

I could write pages, but this is the short of it.

Yesterday driving to Tok, Ak. I noticed the voltage starting to drop. It reached 12.0 +/-. I tightened the battery terminals and there was no change. I started the generator and the chassis batteries started to charge. Made it to Tok.

Made a call to Freightliner Costumer Service and said it was alternator failure. Contacted Fairbanks Freightliner and they agreed with the diagnosis. I have appointment Monday 7/29 where they were going to install a new altenator.

I left this morning with the generator running, however it would not charge the chassis batteries while the engine running as it did the day before not would charge them with the engine not running. Any guesses why?

I returned to the campground. It was a long morning with the repair shop across the street (by that I mean dealing with people who don't do well at focusing on the issue). They do not give much confidence, but I am letting them do the repair. The campground owner told my wife they are very good.

I managed, not the shop, to get a altenator delivered he tomorrow around noon through Freightliner in Fairbanks much to their dismay. I, of course hope all goes well with the repair, but I worry that with ever changing technology, private shop may not be current. Any thoughts on my technology concerns?

I'd did speak with Freightliner Fairbanks and they agreed to keep my Monday appointment check the coach out assuming, of course I make.
__________________

__________________
2018 Newmar Ventana 3407
2016 Jeep Cherokee Trail Hawk
mre 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 07-25-2019, 07:55 PM   #2
Senior Member
 
Join Date: Sep 2010
Posts: 3,290
All coach owners should have a voltage meter to find out what is working and what isn't working. Start by checking battery cables first. It's not usual for factory gauges to give wrong reading. Should be charging around 13.5 volts when the engine is running.
Newmar Man
__________________

__________________
Tom/Teri 16031 NKK 117995 FMCA
18 London Aire 4531 Spartan K-3 605
97-04 LA 04-18 Essex 2018 London Aire
tom chelbana is offline   Reply With Quote
Old 07-25-2019, 08:13 PM   #3
Senior Member
 
Sbrownstein's Avatar
 
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 1,408
I agree that it sounds like a cable and not the alternator. I had a lug crack going down the road at 55 MPH and the engine shut down, hit the boost switch and it started up again. Started the genny and drove for another 4 hours. Of course it wouldn't charge the chassis but it ran the engine. In your case I would take a really close look at the cables and the chassis battery ground connections as well as the engine ground strap since the alternator needs it to charge.

If it starts and runs you have enough current to do that however.
__________________
Scott Brownstein
Palm Island, Florida
2015 Georgetown 335DS
Sbrownstein is offline   Reply With Quote
Old 07-25-2019, 08:13 PM   #4
mre
Senior Member
 
Join Date: May 2006
Posts: 912
Quote:
Originally Posted by tom chelbana View Post
All coach owners should have a voltage meter to find out what is working and what isn't working. Start by checking battery cables first. It's not usual for factory gauges to give wrong reading. Should be charging around 13.5 volts when the engine is running.
Newmar Man
The reading I got came after market gauge package plugged into the OBD (or the desiel equivalent) and not the dash. If I had to rely on the dash gauge, I would have never seen it -- my hands and steering wheel block most of the gauges.

I did check the voltage as did the shop but not at the time the incident occurred. I wish I had.

Thanks.
__________________
2018 Newmar Ventana 3407
2016 Jeep Cherokee Trail Hawk
mre is offline   Reply With Quote
Old 07-25-2019, 08:27 PM   #5
Senior Member
 
Join Date: Jul 2014
Posts: 19,500
How long did you have the generator running before you returned to the CG ?

I don't know what Tok is, but if you were dry camping, your battery isolation/combining system will not allow your inverter/charger ( running off the generator ) to combine the battery banks, so the chassis batteries will charge, until the house battery bank was charged up to about 75% to 80% or 13.6 volts.

Depending on the house battery voltage at startup, even if the house bank was charged on shore power, there could be a 10 minute delay thru the isolation system.
twinboat is online now   Reply With Quote
Old 07-25-2019, 08:29 PM   #6
mre
Senior Member
 
Join Date: May 2006
Posts: 912
Quote:
Originally Posted by Sbrownstein View Post
I agree that it sounds like a cable and not the alternator. I had a lug crack going down the road at 55 MPH and the engine shut down, hit the boost switch and it started up again. Started the genny and drove for another 4 hours. Of course it wouldn't charge the chassis but it ran the engine. In your case I would take a really close look at the cables and the chassis battery ground connections as well as the engine ground strap since the alternator needs it to charge.
That's interesting that it would run the engine while not charging the batteries. When I started out this morning the voltage immediately started to drop then DIC showed low voltage along with dinging. The DIC showed:. (We internet and the image would not upload.

! AUTO IDLE
SYS VOLTAGE 12.0V
THRESHOLD 13.4V

This was at high idle. I
__________________
2018 Newmar Ventana 3407
2016 Jeep Cherokee Trail Hawk
mre is offline   Reply With Quote
Old 07-25-2019, 08:40 PM   #7
Community Moderator
 
"007"'s Avatar


 
Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 29,902
Your battery charging systems are in this link.
If you have the B.I.M. instead of BIRD charging system the B.I.M. could be installed backwards, as pointed out in this link.
These links are in this link sticky.
__________________
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans
VISIT the NEWMAR QUICK TIPS & EASYMODS 1 & 2
QUICK TIPS # 3
RV SYSTEMS & APPLIANCES & RECALLS --- TECH INFORMATION
"007" is offline   Reply With Quote
Old 07-25-2019, 08:49 PM   #8
mre
Senior Member
 
Join Date: May 2006
Posts: 912
Tok is a small in eastern Alaska. Kind of an interesting place, at least to me.

We have 50 amp service so the batteries were charging all night.

In the morning just before leaving, I started the generator. Once it kicked in, we started the engine and the chassis battery dropped and would not charge after about 20-30 minutes. I shut everything down. What I ultimately found was that the generator would charge with the engine off and all I had to do is turn the key to the run position (engine not running) and that would stop the generator from charging the chassis battery. Total opposite of what occurred the day before when the generator was charging the battery while driving down the road.
Quote:
Originally Posted by twinboat View Post
How long did you have the generator running before you returned to the CG ?

I don't know what Tok is, but if you were dry camping, your battery isolation/combining system will not allow your inverter/charger ( running off the generator ) to combine the battery banks, so the chassis batteries will charge, until the house battery bank was charged up to about 75% to 80% or 13.6 volts.

Depending on the house battery voltage at startup, even if the house bank was charged on shore power, there could be a 10 minute delay thru the isolation system.
__________________
2018 Newmar Ventana 3407
2016 Jeep Cherokee Trail Hawk
mre is offline   Reply With Quote
Old 07-25-2019, 09:30 PM   #9
mre
Senior Member
 
Join Date: May 2006
Posts: 912
Quote:
Originally Posted by 007";4881795]Your battery charging systems are in [B][URL="http://www.irv2.com/forums/f103/12-volt-electrical-and-wiring-systems-in-your-newmar-379149.html
this link[/URL][/B].
If you have the B.I.M. instead of BIRD charging system the B.I.M. could be installed backwards, as pointed out in this link.
These links are in this link sticky.
Thanks. For me, this may take some time to read and understand. This is unchartered territory.
__________________
2018 Newmar Ventana 3407
2016 Jeep Cherokee Trail Hawk
mre is offline   Reply With Quote
Old 07-25-2019, 09:54 PM   #10
Community Moderator
 
"007"'s Avatar


 
Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 29,902
Just found this one tonight has to do with fuse in charging system blocking alternator charging.
__________________
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans
VISIT the NEWMAR QUICK TIPS & EASYMODS 1 & 2
QUICK TIPS # 3
RV SYSTEMS & APPLIANCES & RECALLS --- TECH INFORMATION
"007" is offline   Reply With Quote
Old 07-26-2019, 08:29 AM   #11
dms
Senior Member
 
dms's Avatar
 
Join Date: Jun 2008
Location: NC
Posts: 239
On my 2016 MADP, I had the same issue, wherein voltage kept falling toward 11.9 volts. Called FL hotline and the tech told me to hold the bridge switch in to keep voltage up from the house batteries, until I reached a FL dealer up the road. Pulled into a FL dealer in Maryland.

The tech said he probably knew how to fix the problem, as he has seen it before. There is a signal wire from the alternator to the starter which then goes to the ECU, and they have had bad connections on this wire at the starter. He checked it out and sure enough, that was the problem. He cleaned the connection at the starter and re-installed it with loc-tite. No more issues after 2 years. 30 minute fix.
__________________
2016 Newmar Mountain Aire 4553
dms is offline   Reply With Quote
Old 07-26-2019, 10:24 AM   #12
mre
Senior Member
 
Join Date: May 2006
Posts: 912
Quote:
Originally Posted by dms View Post
On my 2016 MADP, I had the same issue, wherein voltage kept falling toward 11.9 volts. Called FL hotline and the tech told me to hold the bridge switch in to keep voltage up from the house batteries, until I reached a FL dealer up the road. Pulled into a FL dealer in Maryland.

The tech said he probably knew how to fix the problem, as he has seen it before. There is a signal wire from the alternator to the starter which then goes to the ECU, and they have had bad connections on this wire at the starter. He checked it out and sure enough, that was the problem. He cleaned the connection at the starter and re-installed it with loc-tite. No more issues after 2 years. 30 minute fix.
What and where is the bridge switch?
__________________
2018 Newmar Ventana 3407
2016 Jeep Cherokee Trail Hawk
mre is offline   Reply With Quote
Old 07-26-2019, 11:58 AM   #13
dms
Senior Member
 
dms's Avatar
 
Join Date: Jun 2008
Location: NC
Posts: 239
The "bridge" switch is a momentary switch on the dash that ties the house batteries to the chassis batteries. Its purpose is to allow cranking the engine in the event the engine batteries are dead. When depressed, a solenoid is energized that parrallels both battery banks together.

In your case, it allows the house batteries to literally feed the engine since the alternator circuit isn't charging. This is temporary, since eventually the house batteries will deplete. You can then run the generator, allowing the converter to charge the batteries and extend the time you need to get to a repair shop.

Rather than continually hold the bridge switch, put a pen knife or toothpick at the top of the switch button to hold it in until you reach a shop.
__________________
2016 Newmar Mountain Aire 4553
dms is offline   Reply With Quote
Old 07-26-2019, 12:17 PM   #14
mre
Senior Member
 
Join Date: May 2006
Posts: 912
Quote:
Originally Posted by dms View Post
The "bridge" switch is a momentary switch on the dash that ties the house batteries to the chassis batteries. Its purpose is to allow cranking the engine in the event the engine batteries are dead. When depressed, a solenoid is energized that parrallels both battery banks together.

In your case, it allows the house batteries to literally feed the engine since the alternator circuit isn't charging. This is temporary, since eventually the house batteries will deplete. You can then run the generator, allowing the converter to charge the batteries and extend the time you need to get to a repair shop.

Rather than continually hold the bridge switch, put a pen knife or toothpick at the top of the switch button to hold it in until you reach a shop.
Okay. I believe you mean the "battery boost" switch. Correct?
__________________

__________________
2018 Newmar Ventana 3407
2016 Jeep Cherokee Trail Hawk
mre is offline   Reply With Quote
Reply



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
Altenator replacement Gloryrolls Monaco Owner's Forum 12 09-18-2013 10:58 AM
house battery not charging with altenator R F S Class A Motorhome Discussions 9 07-24-2013 07:16 AM
altenator replacement stevpaul Winnebago Industries Owner's Forum 1 07-31-2012 08:19 PM
8.1 Altenator Blues! dezertcamper Workhorse and Chevrolet Chassis Motorhome Forum 26 11-15-2010 01:42 PM
Journey house batts not charging from altenator RKL2 Winnebago Industries Owner's Forum 11 10-24-2008 06:35 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:05 PM.


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