Fuse blew out while jump starting

[Alexander8317]

Hi All,

I’m very pleased to be introduced to this group.

I have a quick question.
We have a 2004 International Blue Bird bus.

While trying to jumpstart after batteries died, one of the fuses seems to have blown out.

Does anyone know what could be the common fuse to blow out while trying to jumpstart? So that I can change it

Thank you so much. (I include a picture here of the bus’s electrical diagram).

[turf]

you dont have fuses. you have self reseting breakers.

if you're new to jump starting a bus please tell us more.

turning over and no start, or not turning over at all?

weak battery, voltage?

[Rucker]

Note that image appears to be to the house circuits (not the engine circuits). Turf is guiding you with the right questions.

[fo4imtippin]

There are actually quite a few fuses on a 2004. Most of them are to the left of the steering wheel under a black cover. The main ones that protect the ECU are in a grey electrical box inside the driver's side wheel well. The fuse panel under the driver window are mostly related to non engine things like heaters, wipers, and such.

[Alexander8317]

Originally Posted by fo4imtippin

There are actually quite a few fuses on a 2004. Most of them are to the left of the steering wheel under a black cover. The main ones that protect the ECU are in a grey electrical box inside the driver's side wheel well. The fuse panel under the driver window are mostly related to non engine things like heaters, wipers, and such.

Thank you for this information! Will post reply to main thread now.

[Alexander8317]

Thanks for the reply. Seems you are right! I didn’t get a picture of the fuse box! Will see if I can upload soon. The engine doesn’t turn over at all now. No electricity at all. Not even a buzz sound or dash lights or anything. What do you think?

[Alexander8317]

Hey all, thanks for the replies so far…. Have been very helpful so far. Will see if I can upload a picture of the fuse box soon. If this helps, the engine is not turning over at all. No electricity at all. Not even a buzz sound or dash lights or anything. What do you guys think? Is it just one of the fuses that regulate the ECU?

Thanks again. 🙏

[Rucker]

Starting from the beginning, do you know that the batteries are fully charged and in good condition?

-locate both batteries
-clean the terminals thoroughly
-check the batteries. If they are older than three years, replace them. If they are good, charge them fully.

You should have full lights on the dash; accessories should work, and the bus should at a minimum crank at full starter speed.

Let us know how it's going.

I bought an inexpensive (<$100) battery charger and kept the bus on trickle charge while I worked through some minor electrical drain issues.

I also bought an inexpensive digital voltage meter you plug into the cigarette lighter. That gives me a quick read of battery voltage without screwing around under the hood.

Earlier this year I replaced both batteries with heavy duty, high crank amp units and it is a world of difference.

[Alexander8317]

Thanks for the reply… waiting on my order of new batteries now. But in the mean time, I located the proper fuse box. Because the owner thinks he blew out a fuse while trying to jump start it.
I’ll let you know how it goes once I replace the batteries and the fuse. Thanks again.

[Alexander8317]

Hi all, here is a picture of the correct fuse map. Which of these do you think was most likely to have blown while trying to jump-start the bus?

Because now the dash lights don’t turn on at all when the key is turned. No turning over of the engine either.
Thanks again everyone.

[Alexander8317]

Hi all, here is a picture of the correct fuse map. Which of these do you think was most likely to have blown while trying to jump-start the bus?

Because now the dash lights don’t turn on at all when the key is turned. No turning over of the engine either.
Thanks again everyone.

[Rucker]

Originally Posted by Alexander8317

Hi all, here is a picture of the correct fuse map. Which of these do you think was most likely to have blown while trying to jump-start the bus?

Because now the dash lights don’t turn on at all when the key is turned. No turning over of the engine either.
Thanks again everyone.

You might have a very flat battery. IGN is the ignition (relay) fuse (I'm guessing). INST is the fuse for the instrument cluster (I'm guessing). Very unlikely that one is blown but easy to check.

I'd probably get a good fuse puller and check every fuse, one by one.

[sportyrick]

When jump starting a diesel "anything" with dead batteries they need to be charged from a running vehicle with good cables for at least 1/2 an hour to get the batteries up to a reasonable voltage. Of course many hours of charging off a battery charger depending on the output, a volt meter is essential to check voltage which ideally would be in the high 12's. 12.7 is completely charged, anything below 12 give it up. Sounds like cables might be the problem but you don't know the condition of the batteries yet w/o a voltmeter and possibly an individual cell test. Also check the wiring of the batteries to see it is a 12 or 24 volt system. Trying to start a vehicle with low batteries drives the amps to the moon and the voltage very low which would cause things to overheat like fuses, cables, starters etc.

[River]

Did you ever figure it out my bus is dead also