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11-21-2013, 04:25 AM
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#1
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Member
Newmar Owners Club
Join Date: Jun 2011
Posts: 76
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Alternator-all electric
Hi to all
Getting ready for a long trip and have a stupid question, my coach 05 Mtn Aire is all electric
if the altenator was to let me down while driving
out in the middle of no where, Is there any advantage
being all electric that I can use to get me somewhere
to get it fixed (like borrow from house batteries)
or would that be just a great idea someday
thanks
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11-21-2013, 05:29 AM
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#2
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Senior Member
Join Date: Apr 2011
Location: Northwest Indiana
Posts: 326
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My Discovery's alternator was weak and going bad when I bought it a couple years ago. I ran the generator with the inverter on and it charged up all the batteries. You could monitor the engine battery voltages with the gauge on the dash.
__________________
2004 Fleetwood Discovery 3126 CAT engine
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11-21-2013, 05:52 AM
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#3
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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To add to what previous poster said you also have the Bird charging system that will charge your house batteries and the chassis batteries with the Gen running.
Newmar 12v wiring system.
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11-21-2013, 08:58 AM
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#4
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Senior Member
Join Date: May 2012
Posts: 3,816
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If the engine alternator goes out, just use the genny for keeping the batteries up. Till you get some place to change the alternator.
We drove 1500 miles like this once. It was winter and we were going to be using the genny anyway.
__________________
2011 MVP Tahoe 230 QB on Ford E350 Chassis
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11-22-2013, 04:51 AM
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#5
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Member
Newmar Owners Club
Join Date: Jun 2011
Posts: 76
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Hi everyone
Thanks for the info, the forum is such a great place to gain
knowledge and friends. Camping for years in a 5th wheel didn't have
to know this stuff, Now enjoying my coach but having
to learn a lot of information and could not do that with out
you all
thanks again
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11-22-2013, 05:51 PM
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#6
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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If it has not been mentioned before there are three links in my signature below with much more info for you.
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11-23-2013, 12:18 PM
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#7
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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Depending on the coach, there are two ways to use the generator to sub for the alternator.
1: IF you have a BIRD (BI-Directional Relay Device) isolator, that uses the house CONVERTER to charge the chassis battery when parked..... Simply crank 'er up and wait 2 minutes.
2: If you do not have a BIRD..
2A: jumper from the POSITIVE house battery to the POSITIVE chassis, using a standard Auto jumper
2B: Jumper across the two BIG terminals on the isolator relay
NOTE: This only applies if both house and chassis are 12 volt systems. If chassis is 24 volt you have to go to the 3rd method
Plug in charger (24 volt).
__________________
Home is where I park it!
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11-23-2013, 12:32 PM
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#8
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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All battery systems are 12v in a Newmar coach, 12v battery system.
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11-24-2013, 08:25 AM
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#9
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Member
Newmar Owners Club
Join Date: Jun 2011
Posts: 76
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TO WY8YXM
In your first yes we have B.I.R.D systems what do you
mean "crank it up "
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11-24-2013, 08:38 AM
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#10
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Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
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Go to NAPA and buy a 6 gauge 12 inch long battery cable with eyelets on each end.
Find your Battery Isolator relay and hook one end of the battery cable on each side of the Battery Isolator.
Then start your generator to keep both the chassis and house batteries fully charged.
Generally, your alternator will keep the chassis battery charged FIRST and anything leftover will go to the House batteries. Conversely, when the generator is running, it will keep your HOUSE batteries charged FIRST and anything leftover will go to the chassis batteries.
By jumping the Battery Isolator, the generator will charge both battery banks equally.
I have traveled hundreds of miles for days using this method before I was able to get to a location where the alternator could be removed and rebuilt.
Another suggestion, ALWAYS have you alternator rebuilt versus replacing it with an off-the-shelf one. Motorhome alternators are wired differently than truck, bus or auto alternators.
Dr4Film ----- Richard
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11-25-2013, 03:37 AM
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#11
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Member
Newmar Owners Club
Join Date: Jun 2011
Posts: 76
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Dr4film
Do you mean put that cable on and leave it on all the time ? Or just carry the cable and use when required
Thanks for you help
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11-25-2013, 07:46 AM
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#12
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Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
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No, this procedure is ONLY used when you have an alternator failure. It will allow you to keep the chassis battery from going dead while driving.
One other point I forgot to mention is to try not to drive at night when using this emergency method. The headlights put a significant drain on the chassis battery.
If your coach has an Allison transmission, once your chassis battery gets to about 11.1 - 11.3 VDC or so, your Allison will stop working and you are dead on the road.
It's best to carry this cable to use in emergencies so that it will allow you get to your destination or a place where you can have the alternator removed and rebuilt.
Dr4Film ----- Richard
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11-25-2013, 10:24 AM
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#13
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Senior Member
Newmar Owners Club
Join Date: Oct 2011
Location: On the road.
Posts: 1,432
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Quote:
Originally Posted by Dr4Film
Go to NAPA and buy a 6 gauge 12 inch long battery cable with eyelets on each end.
Find your Battery Isolator relay and hook one end of the battery cable on each side of the Battery Isolator.
Then start your generator to keep both the chassis and house batteries fully charged.
Dr4Film ----- Richard
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Nice bit of info.
Thanks
__________________
John & Diann
2014 Dutch Star 4364
2016 Ford Edge Sport
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11-25-2013, 10:43 AM
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#14
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Member
Join Date: May 2012
Posts: 43
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Dr4Film,
Where will I find the battery Isolator relay? I have a 2000 DSDP. Will it be in the electrical shore power connection compartment or in the compartment with the chassis battery disconnect switch which is just forward of the battery tray on the passenger side.
Thanks.
__________________
WRBrown(drvr), MDBrown(DW)
2000 DSDP(Eddie), 2010 Buick Enclave(Betty)
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