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Old 08-07-2017, 05:09 PM   #1
Mini-Skoolie
 
Join Date: Feb 2017
Location: Baltimore, MD
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Year: 1995
Engine: 12 valve 8.3L Cummins
Disconnecting Emergency Exit Wiring

Hey Everyone!

Got my bus.

1995 TC2000 RE with a 12 valve 8.3L Cummins, and an MT643 Allison transmission.

I'm in the process of gutting. Got the floors/wall panels/ceilings removed.

Now I'm going through the wiring. I'm hoping to pull all the emergency window and door (plus rear hatch window and two roof hatch) wires. Is there any reason why this will be a problem?

I know the bus will have problems starting possibly if the alarm system is in place but I'm hoping it can be removed.

Does anyone have any experience with this?

Thanks!
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Old 08-07-2017, 06:55 PM   #2
Skoolie
 
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I quick rid bit of advice, as you disconnect stuff, check to see if you can start. If it doesn't, you just narrowed it down to whatever you did last. Makes it easier than months worth of work, then trying to figure what you did during that time frame.

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Old 08-07-2017, 09:16 PM   #3
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I agree, check as you cut wires. I have '97 BB TCFE with 5.9 Cummins 12v 6BTA and had no issues cutting wires to roof hatch & emergency windows. The emergency door may have additional wiring since many buses have ignition interlock so door cannot be locked shut with the little slider bolt lock while its running.
Also if the bus is equipped with Child-Check system it could have even more wiring. this is where after shutting off bus the driver has to check for sleeping /hiding kids and push a button or open emergency door/ window in rear of bus or alarm will sound or horn will honk like car alarm.
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Old 08-07-2017, 09:22 PM   #4
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If the emergency door/hatch switches have 2 wires its safe to remove them. If there are 4 there's an interlock.
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Old 08-07-2017, 09:27 PM   #5
Skoolie
 
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Quote:
Originally Posted by EastCoastCB View Post
If the emergency door/hatch switches have 2 wires its safe to remove them. If there are 4 there's an interlock.
I haven't seen one with 4. What do you do if there are 4 ECCB?

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Old 08-07-2017, 09:30 PM   #6
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Quote:
Originally Posted by Charlies.Contingency View Post
I haven't seen one with 4. What do you do if there are 4 ECCB?

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IDK, I'd ask someone smarter than I am about how to get around the interlock. But I'd not even want a bus that new to begin with.
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Old 08-08-2017, 08:13 PM   #7
Mini-Skoolie
 
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Mine only had 1 wire and grounded to frame to make alarm sound. best bet is to check for voltage in the number of wires you have, and simply connect or disconnect them to replicate the normal closed emergency door/hatch/window.
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Old 08-11-2017, 04:15 PM   #8
Mini-Skoolie
 
Join Date: Feb 2017
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Year: 1995
Engine: 12 valve 8.3L Cummins


Thanks for all the replies. I needed to charge my batteries so I could start the bus

Here's the wiring I'm confused about. The two emergency doors have this 3 part awesomeness. I have to duct tape the part that used to get depressed by the door latch to start the bus. There is also a larger looking unit that was mounted to the rear of the bus that was for the rear emergency hatch. Duct taped that and the bus starts.

Does anyone know how I can complete the circuit in the wiring panel and then remove these wires/parts?




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Old 08-12-2017, 03:01 PM   #9
Mini-Skoolie
 
Join Date: Aug 2016
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Non fail safe bus wiring (mine anyway)

My bus was not wired fail safe. Meaning that a condition that wouldn't allow a start created a 12v signal from the yellow box in my bus to the ECM (I'm assuming didn't trace). So if yours is set up similarly you should be able to find the wire labeled interlock on your yellow bus control wire box and remove it. After that all interlocks will be "bypassed". Please follow the advice of previous posters and check often to make sure something disconnected doesn't effect your bus. This is only the way my 99 BB is set up, results may vary
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Old 08-12-2017, 06:46 PM   #10
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is just two relays there and one switch. my guess is that switch is NC normally closed for operation. so that rewiring simple
I would make a schematic diagram on paper, then I could tell the sequence of the relay operation for the door switch.
most all that stuff can be ash canned.
On my thomas, there was a wiring diagram for the entire bus on the access panel so all this stuff was quite easy to remove on mine
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