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Old 11-13-2023, 08:44 PM   #1
Bus Nut
 
Join Date: Jan 2023
Location: Carlsbad NM
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Year: 2002
Coachwork: Blue-Bird All American RE
Chassis: F204270
Engine: Cummins 8.3 ISC
I found 2 cut wires, one leg of each of the Service Emissions

warning lights in the engine bay, I fixed the wires, And as expected, but unfortunately, both the warning Lights are on.

Can someone please tell me what that means?
What do I need to address?
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Old 11-13-2023, 09:30 PM   #2
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Location: South Carolina
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Year: 1995
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Chassis: International 3800
Engine: T444E
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I've not had an emissions bus but if I had to guess you may need a regeneration to take place.
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Old 11-13-2023, 09:41 PM   #3
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Year: 1999
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Quote:
Originally Posted by jfmusic@me.com View Post
warning lights in the engine bay, I fixed the wires, And as expected, but unfortunately, both the warning Lights are on.

Can someone please tell me what that means?
What do I need to address?
I just struck gold for you... all the wiring diagrams specific to your bus.

Unit Dashboard | Portal

download all of them to a flash drive!
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Old 11-13-2023, 09:56 PM   #4
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Quote:
Originally Posted by jfmusic@me.com View Post
warning lights in the engine bay, I fixed the wires, And as expected, but unfortunately, both the warning Lights are on.

Can someone please tell me what that means?
What do I need to address?
Take a look a those wires, do they have numbers imprinted on them?
You might have to remove the loom and look further down the line....
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Old 11-13-2023, 10:17 PM   #5
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I thank you, but I have all the data from that site, and much of the schematics, Which I have verified with one of the bus service companies, do not particularly match what came out in production.

Mine does not tend to match. Some does. Much doesn’t.


Actually, I think it was you that gave me a better set than what was posted there. I quite often still have trouble finding what I am looking for.
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Old 11-13-2023, 10:18 PM   #6
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I didn’t go that far today... was hoping for more info about the process and function before tearing into the harness further. thanks
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Old 11-13-2023, 10:29 PM   #7
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Quote:
Originally Posted by jfmusic@me.com View Post
I thank you, but I have all the data from that site, and much of the schematics, Which I have verified with one of the bus service companies, do not particularly match what came out in production.

Mine does not tend to match. Some does. Much doesn’t.


Actually, I think it was you that gave me a better set than what was posted there. I quite often still have trouble finding what I am looking for.
Oh, I didn't realize that you had all of those.

I was looking at drawing/part number 0028000.

right side of page, cummins ECM connector...B2,B3 and B4.

Was curiously thinking it might be part of that function/circuit. By looking at the wire numbers we could verify that or rule it out.
One way or the other, you would get some kind of answer.
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Old 11-13-2023, 10:40 PM   #8
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The only thing I can find with the word emissions in it, from any of the manuals is the Noisey emissions warranty. That is it. Nothing else.
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Old 11-13-2023, 10:43 PM   #9
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Yeah, the wording is misleading for sure.
I was thinking maybe water in fuel causing emission problems???
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Old 11-13-2023, 10:45 PM   #10
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Thanks will give it a go tomorrow. Much appreciated as always
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Old 11-14-2023, 03:49 PM   #11
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I have a 1995 Bus that came from Los Angeles, and it had no emission stuff from the factory-- but apparently California required them to install an aftermarket exhaust filter-- I guess similar to a DPF. There is an aftermarket panel on my dash that I suspect is connected to an exhaust backpressure sensor before the aforementioned filter, and as that filter begins to be clogged over time, it will turn on a yellow light telling you to service the filter, and a second red light that says to stop the engine if the filter becomes too restricted. My $0.02....
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Old 11-14-2023, 07:02 PM   #12
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Originally Posted by PorchDog View Post
I have a 1995 Bus that came from Los Angeles, and it had no emission stuff from the factory-- but apparently California required them to install an aftermarket exhaust filter-- I guess similar to a DPF. There is an aftermarket panel on my dash that I suspect is connected to an exhaust backpressure sensor before the aforementioned filter, and as that filter begins to be clogged over time, it will turn on a yellow light telling you to service the filter, and a second red light that says to stop the engine if the filter becomes too restricted. My $0.02....
That makes alot of sense !
But his bus was from Arizona. Do they too require that type of emission stuff?
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