Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 09-08-2019, 02:05 PM   #1
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 10,658
THOR #8860
Sprinter Chassis Electrical Woes...

I think that I've really stepped in it now...
I went to open up our rig yesterday, in order to drop it down off it's leveling jacks.
The M-B key wasn't able to remotely unlock the chassis doors: nothing at all happened!
So I open up the coach, and put the key in the ignition...
It wouldn't unlock, and it wouldn't turn.
Then I noticed that there seems to be no power at all up front.
The coach is showing 12.5 volts after I pulled up the jacks...

I do remember that the last time I had thrown my battery disconnect switches: I had some sparking. I thought nothing of it at that time...
I might have popped a main relay or fuse!
I've been digging around in the Fuse Allocation Supplement for about three hours,m and am still stumped.
Can anybody tell me where the Chassis' main breaker might be hidden?
__________________

__________________
Good Sam Member 843599689
FMCA Member F473304

Current coach: Tiffin Wayfarer 24 BW
Former coach: Thor Outlaw 29-H
Bob Denman is offline   Reply With Quote
Old 09-08-2019, 03:28 PM   #2
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 10,658
THOR #8860
Bump...
__________________

__________________
Good Sam Member 843599689
FMCA Member F473304

Current coach: Tiffin Wayfarer 24 BW
Former coach: Thor Outlaw 29-H
Bob Denman is offline   Reply With Quote
Old 09-08-2019, 03:29 PM   #3
Senior Member
 
Hooligan2's Avatar
 
Brand: Thor Motor Coach
Model: 2016 Siesta Sprinter 24ST
State: Florida
Posts: 296
THOR #2812
Bob- You mention coach battery and battery disconnect- both are not part of the chassis electrical. If your rig has been stored, for some time, the Chassis battery may be dead. It is not charged by electrical power (120 volt power cord) connected to the coach, in most Sprinter RV's.
Check your chassis voltage here (Red Connector) and also connect a charger at this terminal - driver side of the air filter. I use a 'Batter Minder' when not in use for a long time. Plug in to power point (cigarette lighter) in the lower dash..
Attached Thumbnails
Click image for larger version

Name:	battery.jpg
Views:	13
Size:	60.0 KB
ID:	20128  
__________________
U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
George-the Newfoundland
Lily- the Pug
1972 Moto Guzzi Eldorado
Hooligan2 is offline   Reply With Quote
Old 09-08-2019, 03:40 PM   #4
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 10,658
THOR #8860
I plugged in a battery charger to that hot lead, and found a good spot to stick the ground cable down on a motor mount...

The needle never moved: just as if nothing was connected.
I even "jiggled" that ground cable around a bit; thinking that some paint or grease might be in the way...

Everything is deader than a hooker's heart: up front.

EDIT: that hot lead is an excellently designed addition to the underhood stuff!
__________________
Good Sam Member 843599689
FMCA Member F473304

Current coach: Tiffin Wayfarer 24 BW
Former coach: Thor Outlaw 29-H
Bob Denman is offline   Reply With Quote
Old 09-08-2019, 05:11 PM   #5
Senior Member
 
Brand: Thor Motor Coach
Model: 2013 ACE 30.1
State: Alberta
Posts: 778
THOR #2631
Hi, I am not familiar with Sprinter chassis but some comments for what it is worth:
Some battery chargers require a minimum voltage on the battery terminals being charged before they will turn on and actually charge......so if your chassis battery is totally dead this may be the reason. You might have to boost the dead battery from another charged car battery to start your charger. Sounds like your chassis battery only charges when the engine is running (unless other methods are used). I suspect the battery isolator system under the driver seat only connects the coach batteries when the engine is running and the alternator is above 13 volts or so.......but does not work the other way when on shore power without mods.


On a side note, if you have a Fusion radio system in a Sprinter class RV it appears there can be issues when the chassis battery dies or disconnects with the Fusion system re-booting in a wrong configuration and affecting the CANbus connected systems in your coach. If you donít have the Fusion head unit then ignore this......for those who might have one in Sprinter class coach .......see the attached:


Dead Chassis Batt now Most Sprinter Electrical Systems Fail - Airstream Forums
__________________
javelin is offline   Reply With Quote
Old 09-08-2019, 06:25 PM   #6
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 10,658
THOR #8860
You may not be familiar with Sprinters: but you knocked this one OUT OF THE PARK!!!
I had completely forgotten about really low batteries not liking to take a charge.
But I pulled the Toad around to the side of the rig, pulled the battery cover (under the driver's floorboards...), and hooked them up.
I gave it about 15 minutes for them to get to know each other, and then I gave it the "remote door lock/unlock" test
Boom-Chaka-Laka!
Put the key in the ignition, and things started waking up. Once I gave it a twist: it came to life with a "What are you looking at me like that?" attitude.
For funsies: I also have started the generator, and put a bit of a load on it. I expect to let it idle out here for a couple of hours, and then I'll start doing a systems check.
So until you're better paid> Thanks a MILLION!
__________________
Good Sam Member 843599689
FMCA Member F473304

Current coach: Tiffin Wayfarer 24 BW
Former coach: Thor Outlaw 29-H
Bob Denman is offline   Reply With Quote
Old 09-08-2019, 06:41 PM   #7
Senior Member
 
Brand: Thor Motor Coach
Model: 2013 ACE 30.1
State: Alberta
Posts: 778
THOR #2631
Glad things are charging for you now Bob.

I think there are articles on line in other forums about replacing the Sprinter class one way battery isolator device under the driver seat to a system that allows bi directional charging......so charges both battery strings if either shore/gen or alternator is running under certain voltage and time parameters. I am not sure how that might affect your warranty though......something to research, until your warranty times out I guess.
__________________
javelin is offline   Reply With Quote
Old 09-08-2019, 06:49 PM   #8
Senior Member
 
Hooligan2's Avatar
 
Brand: Thor Motor Coach
Model: 2016 Siesta Sprinter 24ST
State: Florida
Posts: 296
THOR #2812
Good catch!!

Bob FWIW- that red terminal is the preferred connect for jump starting also...

If you store the RV with power it's a good idea to use a trickle charge on the chassis. If stored without power, pull the chassis battery negative disconnect terminal next to the accelerator pedal. . Read manual, turn off and remove key and wait for computer to count fingers and toes before disconnect. 15-30 secs ??
__________________
U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
George-the Newfoundland
Lily- the Pug
1972 Moto Guzzi Eldorado
Hooligan2 is offline   Reply With Quote
Old 09-08-2019, 07:08 PM   #9
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 10,658
THOR #8860
Thanks for the info!
I figured that I'd jump it directly to the battery since I already had the cover off to check the voltage at the source...
There's a great spot under the hood for a battery charger to sit. I may just stuff a water proof Battery Tender Jr. up under there.
__________________
Good Sam Member 843599689
FMCA Member F473304

Current coach: Tiffin Wayfarer 24 BW
Former coach: Thor Outlaw 29-H
Bob Denman is offline   Reply With Quote
Old 09-09-2019, 12:53 AM   #10
Senior Member
 
Hooligan2's Avatar
 
Brand: Thor Motor Coach
Model: 2016 Siesta Sprinter 24ST
State: Florida
Posts: 296
THOR #2812
I have a paved pad and a power pedestal at home. RV always plugged in, fridge running and AC set on 85 during Florida summer. Battery Minder 1500 is plugged into slideout for power and into dash power point for charging. On my RV that socket connects directly to chassis battery and is always hot.
__________________
U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
George-the Newfoundland
Lily- the Pug
1972 Moto Guzzi Eldorado
Hooligan2 is offline   Reply With Quote
Old 09-09-2019, 06:20 AM   #11
Senior Member
 
Brand: Thor Motor Coach
Model: Four Winds 31E (2019)
State: California
Posts: 236
THOR #12270
Quote:
Originally Posted by Bob Denman View Post
You may not be familiar with Sprinters: but you knocked this one OUT OF THE PARK!!!
I had completely forgotten about really low batteries not liking to take a charge.
But I pulled the Toad around to the side of the rig, pulled the battery cover (under the driver's floorboards...), and hooked them up.
I gave it about 15 minutes for them to get to know each other, and then I gave it the "remote door lock/unlock" test
Boom-Chaka-Laka!
Put the key in the ignition, and things started waking up. Once I gave it a twist: it came to life with a "What are you looking at me like that?" attitude.
For funsies: I also have started the generator, and put a bit of a load on it. I expect to let it idle out here for a couple of hours, and then I'll start doing a systems check.
So until you're better paid> Thanks a MILLION!
__________________
Diemaster is offline   Reply With Quote
Old 09-09-2019, 10:51 AM   #12
Senior Member
 
Judge's Avatar
 
Brand: Thor Motor Coach
Model: Outlaw 29H
State: Florida
Posts: 319
THOR #12751
Bob..... do yourself a favor and make life a little easier.

Install the Trik-L-Start and let your house batteries maintain your chassis batter when you are plugged into shore power or running the genny.

I installed this on my Outlaw and have never had to worry about putting a tender on the chassis battery. When I am plugged into shore power, the chassis battery is being maintained.

And better than that.... after I installed my solar system earlier this summer, I don't even plug into shore power at home and the solar keeps both my house batteries and chassis battery maintained.

The install was super easy and I opted to mount the control unit in the cab so I could see the status lights easily.

https://www.lslproducts.net/TLSPage.html
Attached Thumbnails
Click image for larger version

Name:	Screen Shot 2019-09-09 at 6.56.27 AM.png
Views:	6
Size:	165.5 KB
ID:	20155  
__________________
Judge is offline   Reply With Quote
Old 09-09-2019, 11:13 AM   #13
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 10,658
THOR #8860
That looks like a "gotta have" item; Thanks!
__________________

__________________
Bob Denman is offline   Reply With Quote
Reply

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 01:46 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2