Dazed and confused

[Dazed and confused]

Retired army vet trying to do the skoolie thang but all she does is crank, havent found a flow chart yet or any fuse layout but havent found any bad fuses or wires, started fine no problems and then one day just crankes with 0.0 on the dash with engine protection stareing me in the face. Old school diesels are what im used to this electronic **** is a nightmare but that 4.3 mercedes gets damn good mileage. Would prefer a standard tranny or the 6sp allison but beggers cant be choosers. Shes an 02 so shes old enough to drink. So maybe a center section and stage or 3 in the future when the wireing and computers play nice. Lmao

[Jolly Roger bus 223]

fill in your profile and let us know exactly what bus you have.
i have heard that the mercedes engines can be grumpier than others.

[Dazed and confused]

Thought i had but i guess not, if i buggared anything up lemme know, thank you.

[HamSkoolie]

If she cranks (without really scary noises coming from the engine) but doesn't start it's only a few possible things.


1) The computer is inhibiting start due to:
A) Computer issue
B) Low battery voltage
C) Safety interlock (door, Emerg exit, hatch, engine bay)



2) Fuel delivery - If the engine is getting fuel you should see white smoke and smell diesel at the exhaust. If it's not getting fuel it could be:
A) Out of diesel
B) Computer issue
C) Clogged filter
D) Fuel pump
E) Fuel injector


In my experience (and search the threads here) the three most common causes of "turns over but won't start" are:
A) Low batteries
1) 12V on a 12V battery is 1/2 discharged
2) Hatch not sending proper signal because its open or wire cut
3) Cutting wires out of the harness
Many diesel engine computers wont allow start unless the battery is above a certain voltage during cranking. No idea why that is since the alternator will provide power. On my rig I believe it's 10.5 volt under the load of starting. Go below that and the computer inhibits fuel

[Dazed and confused]

Its gotta be the safety bs, ran perfect one day and next nothing, 0.0 on dash batterys are fully charged,after the no start cut all 6 switches out with no effect, all wired back up with no effect, how do i get my hands on a wireing diagram a book so i can cut the safety crap out??????? Or bypass entirely.

[Meathead]

Doors windows need to be closed but not locked. Ready to drive kids in other words.

[emoji3522]

[Dazed and confused]

After the no start i cut all sensor wires with no effect, ive reatched all senor wires with no effect

[Dazed and confused]

I need a schematic since something is wrong, whatever in the computer is not getting the propper voltage, jumper wire i dont really care just needs to run

[mmoore6856]

this is why i went obd free my 3116 is just
a big lawnmower

[Dazed and confused]

Unless you can send me a conversion kit for mine that doesnt help

[mmoore6856]

With these electronic motors figuring out how to access your codes is what you need to figure out first or your wasting time . They will tell you what is wrong you just have to learn their language. I have learned to avoid these motors as I spent the last 15 years over the road and delt with their eccentricities to the point of despair as I sit on a hot day waiting for a wrecker. The one important lesson I learned is you can not trust electricity

[Dazed and confused]

Iyour not helping go away

[BarnYardCamp]

any chance you may have blown a fuse in the process of cutting, then reattaching safety/sensor wires?

[Dazed and confused]

Always a maybe, checked everything and was unable to find a bad fuse and without a fuse layout im just shooting in the dark , do they make a chiltons manual for buses? Are the diode resistor fusez good or bad?

[BarnYardCamp]

Sorry, most of this stuff is way above my pay grade. I threw the fuse idea out there because sometimes, we overlook the simple things.

[Dazed and confused]

400 dollar scanner needs updated, cross your damb fingers its not useless, cross your fingers dagnabit

[Dazed and confused]

Kiss keep it sumple stupid has saved me more than a few times, dont ask unless im mired in the mudd

[BarnYardCamp]

Any progress? Hoping you conquered the beast.

[Dazed and confused]

Slowly butt, scanner needs updated computer needed updated, and no usb port for my upgrade, slowly, but thanks for checken on me. Lmao

[Dazed and confused]

Where do i find a repair manual for this monstrocity?