2002 MCI Electrical Troubleshooting E28
Вставка
- Опубліковано 28 бер 2021
- It's been a while since I posted a video. In this video (shot in late January), I do some recommended troubleshooting of the electrical problem of the bus not showing any power at the front dash or modules. Hopefully I will get this figured out soon, as I'm not giving up! Thanks for watching.
I have a 2006 MCI, had the same problem. All of a sudden bus would not start. Could not figure why. It was a crucial wire that goes from the front to the back, its in the top luggage area. We accidentally cut it, as soon as we put it back, bus started right up. So glad we hadn’t made our weekly dump run yet. Good luck. 👍
Yep. I believe I have the same problem. I just spoke with a guy willing to work on it last week. He came highly recommended. It sounds like he knows what he's doing.
Thanks for sharing ur journey n knowledge . We have a 2002 MCI , that cluster of wires 😳😱😜.
The joys of a newer bus 🤯, we hear ya .
Thanks Hope. I'd be curious to know where you are at in your project.
Never mind. I just found your videos. I'll be checking those out. Thanks!
Id like to say half way ..... but I have absolutely no clue lol
One job is still one job lol 😉
@@HOPEbus Someone from Richland WA has one too, and they have commented, but I was unable to reply for some reason. You wouldn't happen to be in Richland would you?
@@glennman9890 no we are in Niagara on the Lake Ontario .
Glennman, have you plugged the modules back into the luggage compartment? Did you make sure you put the correct module to the correct wires? You're correct, DO NOT get discouraged. You can run the bus with out any of the modules.
Send power to the ABS, transmission and engine ECM and that's all you need. The dash gauges may wire directly to it. You would have to re-wire the marker lights, signals, low air circuits, etc. There is a wire in the parcel rack that will send a signal to the engine to cut the throttle.
You can also google the DDEC 4 wiring harness, and manually snip the interlock wire. There are interlocks that lead to the transmission too, which get a signal from the modules(positive or negative) not do do something. The transmission doesn't know if a door is open, or if your foot is on the brake. All it sees, is there is an input sending a positive or negative signal, NOT to allow a certain function(shift, throttle, go into gear, etc.).
Do you have any wiring diagrams? I have some schematics for a 2003 that may be able to assist.
B- This is the best information I have received to date. I have a friend that has family that is into diesels (removing engines, modifying them, etc.) One works at a Peterbuilt outfit, and does a lot of work in the side. He is supposed to be getting back to me this week. To answer your questions, the modules are connected correctly, as those wires were never cut or modified. The wiring schematics are available online, but they are like learning a new language. I've always thought that there would be a way to run the bus without the modules, get rid of the interlocks and modules, then rewire the other circuits you mentioned (just like an older bus system). I'll be looking into this bypassing you mention, as it cannot be that difficult. The same engine and transmission is in trucks that are not anywhere near the complicated mess this is. Thanks for your help, this is very good information.
I’m betting it has something to do with a crucial wiring that you may have overlooked during the overhead parcel demolition. I’m told there’s crucial wiring running from the front multiplex junction to the rear junction box, and that if it’s ever cut the bus will not start. But Mr Glenn at any rate I’m praying for the your bus to start back running stronger than it ever had yet.
Much appreciated Marvin. The MCI guy has gotten back to me, but no date yet for any repairs. Hopefully soon!
Well, I have it running and drove the bus today. It still has a couple of issues that I have some parts ordered for, but I drove it 10 feet (went forward and backwards. I need to install the seat also!). Nice huh?
@@glennman9890 That has to be a big relief. That is a pretty big "brick" to have in the back yard. I have been waiting to hear that it was running cause frankly it had the jeezes scared out of me thinking about doing the same or worse to a bus.
@@panoramadan62 Yep. I plan to relocate the bus to another location on the property in the next month or so. I would really like to pour a slab for it first. When I move it, I'll video that too. It's definitely nice to have it running.
I'm not a mechanic but I still have friends who work on MCI fleets and I drove them daily including that model. For what it's worth *everything* including the wheelchair lift, the WCL door, everything is tied into the coach multiplex system. It's Jenga. Disconnect or cut the wrong wire and it's dominoes. I hope you can get the skilled help you need that is familiar with the coach multiplex.
Are your MCI mechanic friends available? I'm hiring!!! I live in the Central Washington State area.
@@glennman9890 Unfortunately they're working f/t 5 days a week at my former transit property. I have a few thoughts and suggestions if you leave me an email to reach you.
Very informational vid! I've got an MCI 8 with some electrical issues as well. In the vid you said you were getting some information from an MCI rep? Any chance you know if he might be able to help me as well? Thanks!
I've lost contact with the guy, as he was retired anyway. However, I have another contact that I might be able to send your way. I'll have to get a hold of him tomorrow and get permission to give out his number. The guy is in the Texas area, but he was able to help me out over the phone.
Hey Glenny boy, any idea where to get the maintenance manuals for the D4500? Trying to find it online but am having trouble.
Have you gone to the MCI site? They have all kinds of resources such as manuals, schematics, etc. If you call the tech line, they will happily direct you to the ones you need. They are very helpful.
@@glennman9890 I'm actually waiting to gain access to the NFI Parts store so I'm pumped! Do you know if that guy in central Illinois has other doors to sell?
@@juicejamsvol3230 No, he had a single bus he was parting out. What part of the country are you in? I have a door I am thinking about selling.
I enjoy you videos ..I’m sure it’s not easy to work on the and edit videos ..great job! Keep them coming ..I’m learning a lot !
Thanks John, Once I get the needed repairs going, I'll be making more videos.
I have an MCI bus D4005 we left lights on, the batteries drained so we charged them up. The batteries heated up and caused the fire suppression to release powder in back of motor. Bought new batteries and doesn’t want to start. We need help!
When you attempt to start it, what does it do? I don't think my bus has a fire suppression system, but I've read that some do. It might have some kind of reset that gets tripped by the release of the suppression device. What year is your bus?
Hey my buss starts but the acceleration Is not working, and it can't shift to gear mode too. please can you help ?
What kind of bus and what year? And, did you dismantle or remove the wheelchair lift?
Did you have the door off last time it would start but not move?
If you could get a certified MCI mechanic to come out with he's diagnostic equipment he should be able to run it down fairly quick they aren't cheap but worth the money when you have a coach as new as yours with all the modules and triple redundancy you have in that model it could be anything it's a sad day when she would start I've been there and mine is way older than that one I have an 84 MC9 what year is your other coach in the shop? Sorry to hear about your issue you'll get it figured out and hopefully it won't be long before she's running.
Yep. I removed the entire wheelchair lift, and drove the bus around afterwords. After that I removed the upper storage bays, including the wiring in them. However, I did not cut the network cables at any time. After that, I was able to start the bus, but it wouldn't drive. Then, one day it wouldn't do ANYTHING. No lights, flashers, dash indicators, nothing. Ever since, I have been trying to just get it to run, or do anything. So far, nothing.
@@glennman9890 weird that it won't run after it did before it sounds like a circuit breaker maybe in the back because if you didn't cut anything and the circuit is still complete there is no reason for it to not run check the wheelchair lift wiring again see if something looks different maybe something came lose a door switch would definitely not allow the coach to move or even start in that area.
Thanks Brian. My other bus is a '74 MCI MC-8. I took it to the shop the other day, but they informed me they are not willing to work on it, so I plan to take it to another place maybe tomorrow. It has some over heating problems, injector issues (I believe), and air leaks, etc. It drives real nice though. There's something to be said about older buses.
Also, I've been in contact with the 12 western state MCI rep. He's promised to come by some day soon.
@@glennman9890 yes we are old school kind of guys young man at least you can narrow down the issues in the older ones
You'll get it figured out Glenn hang in there.
Any updates? You should just post an email address, make a new one just for the channel, so people can reach out to you.
Ok, so the MCI rep will be coming to my house on the 20th. I sent him some of the stuff you mentioned to get his take on it. He'll be looking into doing some of that bypassing you mentioned, etc. I'll let you know how that goes. You can email me at pastor.glennd777@gmail.com if you wish. The information you provided is encouraging and appreciated.
I have the bus running and drivable now. I drove it 10 feet without a seat today, but it starts, shifts, and has throttle.