Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test 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.
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 05-21-2022, 09:49 AM   #1
Member
 
Join Date: Oct 2020
Location: Pickerington Oh
Posts: 53
Send a message via Yahoo to Jim 75
Generator won't start

Hi Everyone, hope all are well. I have a 2012 MADP 4336, ALL Electric coach. Every since I have owned this new to me MH (purchased Apr 2021) I cant get the generator to start on house batteries. So with that being said, I find out these batteries have a date stamp dated 29-11-2010. Unbelievable right? So after testing many time (just voltage) decided to replace them. Load tested old ones after removal some border line, some dead-dead. Installed (8) new Crown AGMs, (charged up) STILL wont start!!


So to start the Gen. I start the big eng, soon as voltage comes up I hit the start button and it fires right off. Your wondering if I use the start procedure? YES I do...So when trying to start on house batts. the gen sounds like there is low batts. The starter is real slow, BUT, when I use the big eng. and hit the Gen start button, it turns over like it is supposed and it starts. I cleaned all cable ends, saw NO sign of corrosion. Did not check cable attachment at the starter as I`m to old to climb under to check. *^%^&*$@@(



So is there separate cables to the starter ?? Is there a relay/solenoid between?? Very frustrating after all this chasing to find the answer, SO HELP PLEASE Thanks Jim
Jim 75 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 05-21-2022, 10:40 AM   #2
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 26,366
I can't provide any exact info for your coach ; but ; I'll comment on how Newmar laid out the battery power to the genset on my vintage Dutch Star .

From the coach battery positive post , within the first 3' of the cable that runs to the front of the coach is a 150 amp circuit breaker that protects the cable to a 12 volt power stud on the outside of the firewall above the genset .
Power stud is in the lower left of this picture .
The 12 volt circuit breaker is mounted on the chassis frame behind the battery tray . From pictures I've seen of battery banks on all electric coaches all I can say is you'll have to follow the cable and look for a C/B like the one in the second photo ; as I mentioned in the first three feet from the positive post .
Attached Thumbnails
Click image for larger version

Name:	IMG_0005.JPG
Views:	9
Size:	86.4 KB
ID:	366157  
Attached Images
 
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 05-21-2022, 10:42 AM   #3
Senior Member
 
Join Date: Aug 2019
Location: Eastern outskirts of Dallas, TX
Posts: 1,611
When you hit the Emergency start switch it ties the coach and house batteries together to act as 1 big battery. That’s what it sounds like your doing.

You need to confirm the proper wiring of the new AGMS’s (it’s probably right or there would likely be smoke).

But what I really think the problem is is that you’ve got some bad battery cables between the battery bank and the genset starter solenoid. Particularly corrosion inside of the battery terminal ends.
To test, attempt to start the genset - give it 20-30 seconds of attempt. Then promptly get out of the coach and CAREFULLY start feeling of all the battery cable terminations and cables in general.
Corrosion presents itself as heat in this situation. The reason for CAREFUL is metallic parts can get extremely hot in this type of test.
__________________
‘91 Ultrastar Champion
‘02 Georgie Boy Landau 8.1l Workhorse - ‘03 Jeep Wrangler TJ 2018 Jeep Wrangler JK toad
MrMark52 is offline   Reply With Quote
Old 05-21-2022, 11:17 AM   #4
Senior Member
 
Mr JP's Avatar


 
Newmar Owners Club
Join Date: Dec 2009
Location: Southern Nevada
Posts: 726
My generator spins over slowly also when using the house batteries and even when plugged in to 50amp service, but does start. I`ve cleaned all cables and checked all connections also.
__________________
Just the Wife & Me!! & Lily our Yellow Lab
2011 Newmar Mountain Aire 4344 !!
450HP Cummins on a Freightliner Chassis !!
Mr JP is offline   Reply With Quote
Old 05-21-2022, 11:41 AM   #5
Senior Member
 
Capt. Bill's Avatar
 
Join Date: Jun 2009
Location: Highland,IL.
Posts: 840
Jim 75- I think you have a corrosion problem at your relays or ground on your Generator. Remove each one, brush it clean with a small stainless steel wire brush, apply dielectric grease & reinstall & tighten back down tight.

Also- next time try starting it at the generator- rocker starter switch8 on generator- and see if there's any difference?

Happy Trails
__________________
Capt. Bill
2014 Newmar Mountain Aire Diesel 4364
2009 Ram 1500 Crew cab toad
Capt. Bill is offline   Reply With Quote
Old 05-21-2022, 11:45 AM   #6
Senior Member
 
Pillbox's Avatar
 
Holiday Rambler Owners Club
Join Date: Jan 2020
Location: Santa Rosa, Ca
Posts: 413
Check the ground cable from house battery to the frame.
Terry
__________________
2017 Thor Four Winds 35SD
2020 Trailhawk toad
Semper Fi
Pillbox is offline   Reply With Quote
Old 05-21-2022, 12:46 PM   #7
Senior Member
 
USMCRET's Avatar
 
Newmar Owners Club
Join Date: Jul 2011
Posts: 2,867
Generator wont start

How old are your chassis batteries, and are you sure the gen doesn’t use them for starting power? My old KSDP used the chassis’s batts.
__________________
2021 DSDP 4326 Freightliner
2005 KSDP 3910 Spartan
USMCRET is offline   Reply With Quote
Old 05-22-2022, 06:11 AM   #8
Senior Member
 
Join Date: Mar 2009
Location: Apollo Beach & Key West , FL
Posts: 3,219
One our 2013 DS, the genset starts from the chassis batteries. There is a 40ft or so cable that runs from the rear of the coach to a stud located behind the front fuse/electrical bay. Then there is a short run from that stud to the studs on the genset. I found on our DS, hat the battery cable end at the chassis batteries was just touching the battery terminal. It wasn't bolted on!
__________________
2013 DS 4338
2015 F-150 toad with kayaks,bicycles and a Harley in the back
PanJH is offline   Reply With Quote
Old 05-22-2022, 01:31 PM   #9
Senior Member
 
Rev. Roy's Avatar
 
Spartan Chassis
Join Date: Mar 2017
Posts: 876
When you said, "So to start the Gen. I start the big eng, soon as voltage comes up I hit the start button and it fires right off." that immediately said to me that the generator starts off the chassis batteries, not the house ones. Here's a test. Put a battery charger on the chassis batteries and try starting the generator before starting your engine. I am willing to bet it will start. If it starts, you'll need new chassis batteries.
Rev. Roy is offline   Reply With Quote
Old 05-22-2022, 02:00 PM   #10
Senior Member
 
Join Date: Jul 2014
Posts: 30,340
I would think that if he can start the main engine with the chassis batteries and the generator was also using them, the same batteries would start the smaller generator.

That leads us back to the house batteries starting the generator. Starting the main engine combines the healthy chassis batteries to the house batteries.

How about you post a picture of your house battery cable arrangement.

May be able to see any issues there.
twinboat is offline   Reply With Quote
Old 05-22-2022, 07:04 PM   #11
Member
 
Join Date: Oct 2020
Location: Pickerington Oh
Posts: 53
Send a message via Yahoo to Jim 75
Jim 75 here!! First I want to thank ALL of you for your time and Info. helping me find the solution to my problem.


Having so many suggestions, let me update some of them.
I do hold the start switch to prime and warm first.
I have tried the Batt. Boost switch NO help.
I have tried the Rocker switch on the Gen. still NO.

If the chassis batteries (was told they were new ) will start the 450 HP diesel why wont they start the Gen. Unless they run a cable 43 ft to the Gen. This doesnt make sense to me??? Because using the BIG eng will start it real quick.
I will check tomorrow for a HOT cable / ground cable to the frame connection, and add a pic of old and new Batt.bank. Again many thanks---to be continued JIm
Jim 75 is offline   Reply With Quote
Old 05-23-2022, 08:50 AM   #12
Senior Member
 
BrokeDown's Avatar
 
Join Date: Mar 2016
Location: Fort Myers, FL
Posts: 568
My generator starts off it the chassis batteries. House batteries can be dead and the generator will start.

I would check the chassis batteries and all of the wires, terminals, etc from the batteries to the generator, both positive and ground.

Are your chassis batteries AGM or Flooded? If flooded, have you added (distilled) water lately?

-B
__________________
2008 MADP 4523 w/Hydralift MC Lift - 2016 Jeep Rubicon HR Unlimited - 2012 Harley FLTRU
2022 Momentum 351MS-R (ordered) - 2022 F450 Platinum (ordered)
Fulltime RVing since 4/16/16 - FMCA F477382
BrokeDown is offline   Reply With Quote
Old 05-24-2022, 07:54 AM   #13
Senior Member
 
Join Date: Aug 2019
Location: Eastern outskirts of Dallas, TX
Posts: 1,611
You really, really, need to get the wiring diagram for your coach.
__________________
‘91 Ultrastar Champion
‘02 Georgie Boy Landau 8.1l Workhorse - ‘03 Jeep Wrangler TJ 2018 Jeep Wrangler JK toad
MrMark52 is offline   Reply With Quote
Old 05-24-2022, 08:30 AM   #14
Senior Member
 
Join Date: Jan 2021
Posts: 2,114
Quote:
Originally Posted by Jim 75 View Post
Jim 75 here!! First I want to thank ALL of you for your time and Info. helping me find the solution to my problem.


Having so many suggestions, let me update some of them.
I do hold the start switch to prime and warm first.
I have tried the Batt. Boost switch NO help.
I have tried the Rocker switch on the Gen. still NO.

If the chassis batteries (was told they were new ) will start the 450 HP diesel why wont they start the Gen. Unless they run a cable 43 ft to the Gen. This doesnt make sense to me??? Because using the BIG eng will start it real quick.
I will check tomorrow for a HOT cable / ground cable to the frame connection, and add a pic of old and new Batt.bank. Again many thanks---to be continued JIm
How else would the generator start if there were not cables running from the batteries to the generator?

Are the batteries located in close proximity to the engine? That’s one set of cables from the batteries to the starter. Are the batteries located some distance from the generator? Perhaps ~40’? That’s another set of cables.

It sounds as though your chassis batteries are healthy, as they are able to start the engine. The link between the batteries the generator appears to be somewhat compromised. It is unable to start the generator with the batteries at ~12.7V, but it is able to start it once the alternator is providing ~14.0V. Check the run from batteries to generator.
__________________
Alpine Coach ‘05 36MDDS
Kid Gloves is online now   Reply With Quote
Reply

Tags
generator



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
03 Winnebago Itasca Horizon will not start won't start 😞 Flares Winnebago Industries Owner's Forum 3 07-27-2021 06:15 PM
Onan EC-30 auto start issues...won't start for HVAC CALL jstdreamin MH-General Discussions & Problems 7 05-24-2016 11:04 AM
Generator Won't Start - Engine Won't Crank Rob Howden RV Systems & Appliances 10 08-02-2015 07:35 PM
2007 600HP ISX stalled after start, now won't start slemnah Cummins Engines 2 01-26-2015 08:06 AM
Jacks won't retract and engine won't start HLB MH-General Discussions & Problems 12 07-31-2009 10:22 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 10:52 PM.


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