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10-28-2023, 05:48 PM
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#1
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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Where do I connect our Parking brake interlock connector?
We are in over our heads, but still hopeful! Can anyone help us?
We were trying to take out some of the miles of wires that are in the bus. We unplugged one that NEEDS to stay plugged in. Now we don’t know where we unplugged it from or where it goes. We have a 2004 International 30 ft school bus with AIR BRAKES DT466E and Alison 3060 transmission.
Do you know where this goes? Or can you help me find someone who does? I tried to upload the picture and hope you can see it. Thank you for any leads you can share!
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10-28-2023, 07:03 PM
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#2
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Bus Geek
Join Date: Sep 2018
Posts: 2,831
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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Sorry I can’t help you except to maybe move the troubleshooting along.
Did the bus function before removing this single cable or did other stuff get pulled at the same time?
How long is the cable assembly? Seems like
You know where one end goes, so if you connect it and pull it to its longest length then you know it connects somewhere it can reach.
Did you remove the cable assembly that it connects?
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10-28-2023, 09:34 PM
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#3
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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THANKS!
Yes the bus functions and drives great before removing this single cable.
The cable assembly is about 6 feet long.
I don't think we removed the cable assembly that it connects to.
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10-28-2023, 09:49 PM
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#4
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Bus Nut
Join Date: Oct 2018
Location: Central Alabama
Posts: 675
Year: 1998
Coachwork: Blue Bird
Chassis: TC/2000
Engine: 5.9 Cummins 12-valve
Rated Cap: 1
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What is the entire part number of the switch that ends in C2? Was it removed in the pic with the spade connector?
Also are there any numbers on the wire?
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10-31-2023, 08:33 PM
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#5
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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Thanks! Here are the numbers that we see, is this what you are talking about?
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10-31-2023, 09:01 PM
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#6
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Bus Geek
Join Date: May 2015
Location: Central Tx.
Posts: 2,505
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
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Quote:
Originally Posted by Stacie
We are in over our heads, but still hopeful! Can anyone help us?
We were trying to take out some of the miles of wires that are in the bus. We unplugged one that NEEDS to stay plugged in. Now we don’t know where we unplugged it from or where it goes. We have a 2004 International 30 ft school bus with AIR BRAKES DT466E and Alison 3060 transmission.
Do you know where this goes? Or can you help me find someone who does? I tried to upload the picture and hope you can see it. Thank you for any leads you can share!
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The pdf pictures don't really show much to me.
what is the real issue that is going on?
Brakes won't release???
Won't go into drive ???
Will not start now?
Also, on the actual wire them selves, not on the plastic loom....are there any numbers printed on the wires themselves?
Can you please share what the real issue is.
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10-31-2023, 09:15 PM
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#7
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Bus Nut
Join Date: Oct 2018
Location: Central Alabama
Posts: 675
Year: 1998
Coachwork: Blue Bird
Chassis: TC/2000
Engine: 5.9 Cummins 12-valve
Rated Cap: 1
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Stacie, I was referring to the round thingy that was in the original pictures which you had circled. In has a number that ends c2. Also the wire inside of the plastic loom may have a short number and maybe a letter written on the side of the wire itself. What are those numbers?
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10-31-2023, 09:35 PM
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#8
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Bus Geek
Join Date: May 2015
Location: Central Tx.
Posts: 2,505
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
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Stacy,
I re-read the comments in the PDf you uploaded...
Bus not going into gear because of the brake input not functioning ???
If this is the case there might be another easy workaround that I personally confirmed DOES work. I did it on my bus!
I changed my trans computer with one from a 2005 bus that had a wheelchair lift (special needs). My bus would start but would not go into gear!
I fixed it real easy by simply shorting together two wires.
Go to my build thread --> HERE . post # 146.
You will find a file I uploaded called "TCM Interlock".
Before you go and do what I did, please first confirm what is going on with your bus. Is your shift selector just blinking/Flashing and won't go into gear?
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12-18-2023, 10:39 AM
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#9
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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Brakes locking up
It is going into gear. It's just that it has to do with some kind of valve that is one of the safety features that locks brakes if one of the doors was open on a handicapped bus. We tried to get the mechanic to help us and they thought they had bypassed it. It worked and we were able to drive for about four miles, then locked up again. Does anyone know of a willing mechanic who will work on a 2004 International DT466E. for us that is close to Birmingham AL? Thanks!!
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12-18-2023, 12:40 PM
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#10
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Bus Nut
Join Date: Oct 2018
Location: Central Alabama
Posts: 675
Year: 1998
Coachwork: Blue Bird
Chassis: TC/2000
Engine: 5.9 Cummins 12-valve
Rated Cap: 1
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Are you going to ignore their questions too?
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12-18-2023, 01:32 PM
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#11
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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Y’all please excuse me if I missed a question. I’m not very tech savvy and am trying my best. And I don’t really know what I’m talking about, I wish I could just get someone out here to help me actually look at it. If I’ve missed any questions, I’ll try to go back and comment. Thanks again for any help y’all we really appreciate it.
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12-18-2023, 01:44 PM
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#12
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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We bought the bus 9 months ago. It worked fine driving and stopping for about 7 months. Then two months ago the brakes started locking up. At first we thought it was the cables we showed earlier in this thread. But now we don’t necessarily think that. We saw that the big spring in the brake chamber was broken, so my husband changed that out. But it didn’t fix it. So he caged the brakes to drive it to the shop. We took it to a shop and they said they bypassed a solenoid that was basically saying is the main door closed. Cause if the door wasn’t closed it would lock the brakes. We drove it home from there fine about 5 miles 2 weeks ago. And we thought it was fixed. We’re starting it up every few days. Yesterday we tried to take it out on the road again. But the brakes locked up again just 500 yards from our house. So, we’re still trying to figure out the issue. The bus does go into gear both drive and reverse. It’s just that the brakes lock up as it is moving and we have to completely stop. I hope that answers the questions, please let me know if not. Blessings to you this Christmas!
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12-18-2023, 02:17 PM
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#13
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Bus Geek
Join Date: May 2015
Location: Central Tx.
Posts: 2,505
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
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Quote:
Originally Posted by Stacie
We bought the bus 9 months ago. It worked fine driving and stopping for about 7 months. Then two months ago the brakes started locking up. At first we thought it was the cables we showed earlier in this thread. But now we don’t necessarily think that. We saw that the big spring in the brake chamber was broken, so my husband changed that out. But it didn’t fix it. So he caged the brakes to drive it to the shop. We took it to a shop and they said they bypassed a solenoid that was basically saying is the main door closed. Cause if the door wasn’t closed it would lock the brakes. We drove it home from there fine about 5 miles 2 weeks ago. And we thought it was fixed. We’re starting it up every few days. Yesterday we tried to take it out on the road again. But the brakes locked up again just 500 yards from our house. So, we’re still trying to figure out the issue. The bus does go into gear both drive and reverse. It’s just that the brakes lock up as it is moving and we have to completely stop. I hope that answers the questions, please let me know if not. Blessings to you this Christmas!
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Don't know what you disconnected or what solenoid was bypassed...but I hope this helps you go in the right direction.
QUESTIONS
What body style is your bus?
Did you disconnect or remove any items such as a wheelchair lift or emergency exit switches?
I posted numerous interlock diagrams in this thread, take a look.
By the way, save a life, never drive with the brakes caged!
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12-18-2023, 06:33 PM
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#14
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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Bama Bus, I’m sorry I can’t seem to figure this forum out and how to PM you back so I’m responding on the main thread.
My husband caged both of the rear brakes to get it 4 miles to the shop. We won’t drive it with caged brakes other than that. Thanks - good safe advice.
We did remove a bunch of wiring and we bought it after the wheelchair lift had already been removed. So it is no longer standard.
When we thought it had been fixed over thanksgiving break, the mechanics had bypassed the sensor/solenoid that had been attached to the main front door. It drove back home 4-5 miles. We started it every few days. But we just took it back out on the road again yesterday . Drove 500 yards and the emergency brake locked up and stopped us in the middle of our street.
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12-18-2023, 09:54 PM
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#15
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Bus Nut
Join Date: Oct 2018
Location: Central Alabama
Posts: 675
Year: 1998
Coachwork: Blue Bird
Chassis: TC/2000
Engine: 5.9 Cummins 12-valve
Rated Cap: 1
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Quote:
Originally Posted by Stacie
Bama Bus, I’m sorry I can’t seem to figure this forum out and how to PM you back so I’m responding on the main thread.
My husband caged both of the rear brakes to get it 4 miles to the shop. We won’t drive it with caged brakes other than that. Thanks - good safe advice.
We did remove a bunch of wiring and we bought it after the wheelchair lift had already been removed. So it is no longer standard.
When we thought it had been fixed over thanksgiving break, the mechanics had bypassed the sensor/solenoid that had been attached to the main front door. It drove back home 4-5 miles. We started it every few days. But we just took it back out on the road again yesterday . Drove 500 yards and the emergency brake locked up and stopped us in the middle of our street.
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Most interlock systems that I am aware of are crank inhibitors not brake locking. The only system that I know of tied to brakes would be a hydraulic service brake with air parking. Not knowing for sure what you have makes it harder to give any advice.
The issue seems to be brake system related. You had told me that the air pressure was reading 120 psi so I feel that some component is causing you to lose air to the rear brakes. That will involve someone with more knowledge of air brake systems.
Were you able to reinstall the part that was removed when you had the dash out? It has a part number ending with C2.
Maybe the mechanic that bypassed the solenoid can give you insight on what he did. Otherwise it was probably a lucky coincidence that you got home.
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12-19-2023, 12:00 AM
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#16
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Bus Geek
Join Date: May 2015
Location: Central Tx.
Posts: 2,505
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
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Quote:
Originally Posted by BamaBus
The issue seems to be brake system related. You had told me that the air pressure was reading 120 psi so I feel that some component is causing you to lose air to the rear brakes. That will involve someone with more knowledge of air brake systems.
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Stacie,
Bamabus touched on a really important point here regarding air pressure.
When the brakes lock up while driving does the yellow air button pop out?
Do you know how to to a D.O.T. pre-trip air pressure test?
I would highly suggest you do one and let us know if your system passes or fails. It is real easy and quick to do and will tell you right away if you are experiencing a loss of air pressure and you will also be able to test if your low air pressure alarm is working.
If anything this would be step one of the troubleshooting process. got to confirm the basics first...are you losing air pressure?
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12-19-2023, 09:20 AM
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#17
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Bus Geek
Join Date: May 2014
Location: West Ohio
Posts: 3,835
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IIRC on our handicap buses, once the lift doors are opened, they use 2 solenoids to 1. disable air to the spring brake knob, and 2. apply air to the front axle relay valve, applying the front brakes.
I'm not certain how international/IC did it, all of ours were bb all americans.
If it were me, and your bus operates similar to what I'm thinking, I'd get your hatchet that you used for the wiring back out and hack those air interlock solenoids out too. One of your bypasses likely has a sporadic connection, which is why it's fine and then not without any perceivable input on your part.
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12-19-2023, 09:57 AM
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#18
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Bus Crazy
Join Date: Mar 2017
Location: arkensas
Posts: 1,109
Year: 1997
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: 71 now 2 humans 1 cat
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caged brakes do not affect the service brakes so driving with caged brakes is not unsafe. it is only unsafe when you park as you have no park brake.a set of chock blocks will help. however the law does not like you to do that but as a mechanic we did many times to get trucks off the road. now to her issue it seems we are getting fixated on brakes when we need to address a transmission issue or a tranny imput issue. sorry im not familiar with that system so try to find someone with that bus is your best bet
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12-19-2023, 10:15 AM
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#19
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New Member
Join Date: Mar 2023
Location: Birmingham AL
Posts: 9
Year: 2004
Coachwork: International
Chassis: 30 foot special needs
Engine: DT466e Alison 3060 Transmission
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Thanks everyone for your input and expertise. I’ll let you know when we can get it back from the shop and what they tell us. For now it’s in line waiting for the tech to look at it again. Blessings! Merry Christmas!
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12-19-2023, 03:09 PM
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#20
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Bus Geek
Join Date: May 2015
Location: Central Tx.
Posts: 2,505
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
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Quote:
Originally Posted by mmoore6856
it seems we are getting fixated on brakes when we need to address a transmission issue or a tranny imput issue. sorry im not familiar with that system so try to find someone with that bus is your best bet
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If it were a tranny (TCM-electrical) input issue the brakes would be locked from the get go, as soon as you start the bus.
In her previous post she stated that they drove the bus for approx. 500 yards and "the emergency brake locked up and stopped the bus in the middle of the street".
This to me would indicate a potential air leak.
Which is why I recommended doing an air brake air leak test.
Another possibility is that maybe there is a loose/cut wire bouncing around and grounding....causing the interlock circuit to activate???
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