Reply
 
Thread Tools Display Modes
 
Old 05-26-2020, 04:03 PM   #1
New Member
 
Join Date: May 2020
Posts: 5
Question Off to a dead start

So i recently purchased my first bus, a 30ft Thomas freightliner sf-65. We jumped in with gusto to start removing the internals and in our haste, ok in my haste, I disconnected my batteries without taking a picture. Never the less i have a fairly good memory and have changed a battery in my time so i reconnected the multiple leads as best as memory served. the power was on the lights work, i turn the key. all the power dies. disconnect and reconnect the leads and the same thing happens. turn the key halfway, powers on, turning to crank and it cuts out. what am i missing.
(here is what the battery set up is with the leads disconnected.
Attached Images
File Type: jpg IMG_9442.jpg (358.2 KB, 47 views)
KodaTheBus is offline   Reply With Quote
Old 05-26-2020, 04:13 PM   #2
Bus Crazy
 
Join Date: Sep 2018
Posts: 1,375
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
Did you check the voltage on the batteries? Youíll want to do this separately. They should be somewhere around 13.5 volts. Both should be the same.
Danjo is offline   Reply With Quote
Old 05-26-2020, 04:16 PM   #3
Bus Nut
 
Rovobay's Avatar
 
Join Date: Sep 2017
Location: Damascus, OR
Posts: 673
Year: 2004
Chassis: International
Engine: T444e w/ 2000 Allison Trans
Rated Cap: 35
I see 3 leads disconnected. the 2 on the bottom connect to the positive right? the one in the back to the negative. you are hooking up that little one on the far right in the corner of the tray? post a pic of everything hooked up.
__________________
My Build: https://www.skoolie.net/forums/f11/sk...doo-22140.html

Follow our build on Instagram at https://www.instagram.com/skoolie_doo/
Rovobay is offline   Reply With Quote
Old 05-26-2020, 04:19 PM   #4
Bus Crazy
 
Join Date: Sep 2018
Posts: 1,375
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
Also clean all your connections. And the grounds too. You can use Dish soap and water and a green scrubby, followed by clean water and dry with a rag. If you have corrosion, you can use sand paper to clean that off. If you have that white oxidation, you can use a toothbrush and a baking soda/water solution.
Danjo is offline   Reply With Quote
Old 05-26-2020, 04:21 PM   #5
Bus Crazy
 
Join Date: Sep 2018
Posts: 1,375
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
When I’m doubt, trace your cables. The negative cables will bolt to the chassis
Danjo is offline   Reply With Quote
Old 05-26-2020, 04:22 PM   #6
New Member
 
Join Date: May 2020
Posts: 5
yeah i need to get a voltmeter
KodaTheBus is offline   Reply With Quote
Old 05-26-2020, 04:34 PM   #7
New Member
 
Join Date: May 2020
Posts: 5
Quote:
Originally Posted by Rovobay View Post
I see 3 leads disconnected. the 2 on the bottom connect to the positive right? the one in the back to the negative. you are hooking up that little one on the far right in the corner of the tray? post a pic of everything hooked up.
yeah there are several. i just find it odd that i have headlights, heating and everything when they are connected yet it dies instantly when i try and start it. I'm going to check by seeing what sort of charge they have
Attached Images
File Type: jpg IMG_9453.jpg (355.6 KB, 29 views)
File Type: jpg IMG_9454.jpg (298.3 KB, 21 views)
KodaTheBus is offline   Reply With Quote
Old 05-26-2020, 06:21 PM   #8
Mini-Skoolie
 
Join Date: Oct 2018
Location: Central Alabama
Posts: 57
Year: 1998
Coachwork: Blue Bird
Chassis: TC/2000
Engine: 5.9 Cummins 12-valve
Rated Cap: 1
Quote:
Originally Posted by KodaTheBus View Post
the power was on the lights work, i turn the key. all the power dies. disconnect and reconnect the leads and the same thing happens. turn the key halfway, powers on, turning to crank and it cuts out. what am i missing.
So the power go out and then you don't have any power until you adjust the leads? If so, it sounds to me like you have a bad connection and not a bad battery? Try wiggling each connection, one at a time to see if the power comes back on.
Is that some type of negative fuse/shunt in front of the battery? Connections look kinda crusty.
BamaBus is offline   Reply With Quote
Old 05-26-2020, 06:22 PM   #9
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 21,964
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
is your bus a wheelchair bus?
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 05-26-2020, 06:56 PM   #10
Mini-Skoolie
 
Join Date: Oct 2018
Location: Central Alabama
Posts: 57
Year: 1998
Coachwork: Blue Bird
Chassis: TC/2000
Engine: 5.9 Cummins 12-valve
Rated Cap: 1
Quote:
Originally Posted by EastCoastCB View Post
is your bus a wheelchair bus?
I know that you were asking about Koda and I was wondering the same. I have a Thomas with a lift and it has a 100 amp breaker that is connected on the positive side.

I might add that bad wiring to that fuse would cause a no start.
BamaBus is offline   Reply With Quote
Old 05-26-2020, 07:00 PM   #11
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 21,964
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by BamaBus View Post
I know that you were asking about Koda and I was wondering the same. I have a Thomas with a lift and it has a 100 amp breaker that is connected on the positive side.

I might add that bad wiring to that fuse would cause a no start.
I disconnected mine when I removed the lift. but I only had the two big main leads and two smaller but still large leads for the wc lift. looking at op's pic I don't know what any of the other wires are for. and yeah that fuse.

I'm not good at electricity but I'd probably try just hooking up the main leads and add the rest back as needed if stuff didn't work.
Scrub the terminals and connectors with a wire brush or sandpaper till they're shiny.
I took a few pics when I was changing my batteries a couple months ago.

__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 05-26-2020, 07:10 PM   #12
Bus Crazy
 
Join Date: Jun 2013
Location: Picton,Ont, Can.
Posts: 1,956
Year: 1997
Coachwork: Bluebird
Chassis: GMC
Engine: Cat 3116
Rated Cap: 72
Every battery connection needs work, shine the lugs up like new.

How old are those batteries? I see sulphation so they are likely weakk, but more so with terrible connections such as they are.
In your pic of the batteries connected, that small wire on the neg post, are you sure that is a neg? Looks red on the other end but hard to follow.
connection to battery try is needing improvement.


John
__________________
Question everything!
BlackJohn is offline   Reply With Quote
Old 05-26-2020, 07:15 PM   #13
Bus Geek
 
ol trunt's Avatar
 
Join Date: Apr 2012
Location: So Cal
Posts: 2,713
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
By the hookup you show it looks like the bus is a 12v start---do you know that it isn't a 24v start? If so, the battery hook up is wrong to get 24v????
Jack
ol trunt is offline   Reply With Quote
Old 05-26-2020, 07:53 PM   #14
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 21,964
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Pretty sure if its a thomas school bus its 12v. Isn't 24v just coaches and military stuff?
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 05-26-2020, 08:20 PM   #15
New Member
 
Join Date: May 2020
Posts: 5
Quote:
Originally Posted by EastCoastCB View Post
I disconnected mine when I removed the lift. but I only had the two big main leads and two smaller but still large leads for the wc lift. looking at op's pic I don't know what any of the other wires are for. and yeah that fuse.

I'm not good at electricity but I'd probably try just hooking up the main leads and add the rest back as needed if stuff didn't work.
Scrub the terminals and connectors with a wire brush or sandpaper till they're shiny.
I took a few pics when I was changing my batteries a couple months ago.

yes mine also has a lift. The batteries have sat unhooked up for about 3 weeks, i wouldn't think that that has too much potential for them to fail but ill clean and scrub everything then try and troubleshoot where the cables go.
KodaTheBus is offline   Reply With Quote
Old 05-26-2020, 08:54 PM   #16
Bus Nut
 
CHEESE_WAGON's Avatar
 
Join Date: Sep 2013
Location: Virginia
Posts: 922
Year: None
Coachwork: None
Chassis: None
Engine: None
Rated Cap: None
Quote:
Originally Posted by EastCoastCB View Post
Pretty sure if its a thomas school bus its 12v. Isn't 24v just coaches and military stuff?
Even some 6.2 Detroit engines were set up for 24V start. (CUCV military applications mostly). This came up in the process of identifying the correct starter for the other P20 motorhome I have, as it was a 6.2 Detroit.

Not too far out of the realm of possibility for a Freightshaker FS65 to have a 24V start setup.
__________________
"Cheese Wagon" <anomaly.va@gmail.com>

Former owner - 1989 Ford B700 64-pass Blue Bird (Rest In Peace, Cheese Wagon)
CHEESE_WAGON is offline   Reply With Quote
Old 05-26-2020, 10:03 PM   #17
New Member
 
Join Date: May 2020
Posts: 5
I cleaned off the contacts, charged up the batteries, and got it started. probably will have to replace them at a point, but for now it will allow me to drive it to get titled and registered. Thanks everyone!
KodaTheBus is offline   Reply With Quote
Old 05-27-2020, 04:31 AM   #18
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 21,964
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by CHEESE_WAGON View Post
Even some 6.2 Detroit engines were set up for 24V start. (CUCV military applications mostly). This came up in the process of identifying the correct starter for the other P20 motorhome I have, as it was a 6.2 Detroit.

Not too far out of the realm of possibility for a Freightshaker FS65 to have a 24V start setup.
Hmmm I've not seen a 24v school bus.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 05-27-2020, 04:33 AM   #19
Bus Nut
 
CHEESE_WAGON's Avatar
 
Join Date: Sep 2013
Location: Virginia
Posts: 922
Year: None
Coachwork: None
Chassis: None
Engine: None
Rated Cap: None
Quote:
Originally Posted by CHEESE_WAGON View Post
Even some 6.2 Detroit engines were set up for 24V start. (CUCV military applications mostly). This came up in the process of identifying the correct starter for the other P20 motorhome I have, as it was a 6.2 Detroit.

Not too far out of the realm of possibility for a Freightshaker FS65 to have a 24V start setup.
Quote:
Originally Posted by EastCoastCB View Post
Hmmm I've not seen a 24v school bus.
I said possibility, not certainty. You'll notice I said these were mostly CUCV military vehicles.
__________________
"Cheese Wagon" <anomaly.va@gmail.com>

Former owner - 1989 Ford B700 64-pass Blue Bird (Rest In Peace, Cheese Wagon)
CHEESE_WAGON is offline   Reply With Quote
Old 05-27-2020, 08:07 AM   #20
Bus Crazy
 
Join Date: May 2014
Location: West Ohio
Posts: 1,696
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
Quote:
Originally Posted by EastCoastCB View Post
Pretty sure if its a thomas school bus its 12v. Isn't 24v just coaches and military stuff?
Pretty much. It's also privy to some ag and construction equipment.

Very little on road stuff will run 24v.

And connecting a 12v vehicle to 24v will let the magic smoke out of a lot of devices.
__________________
The Silver Bullet https://www.skoolie.net/forums/f11/p...llet-9266.html
Booyah45828 is offline   Reply With Quote
Reply

Tags
bus batteries, starting issues

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

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 05:13 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×