Help on coach battery wiring

[Blkbart]

Hello all,
New to class A motorhomes. I have a 2003 Itasca 34HD and I just replaced the Trojan T105 plus batteries. I was pretty thorough in viewing the batteries wiring with pictures and diagraming them. I have the batteries installed now and went in the motorhome to try the 12 volt systems and start the generator. No go? The batteries are wired in series and I have the 13.6 volts reading. The coach seems to have two 12V sources coming from the, one having a large round fuse placed in the cable, the other comes directly from the coach to the rearward posts. Upon pulling the coach tray out, there was an arc from the battery frame structure and the larger round fuse/link. I immediately pushed the tray back in and took the ground cable off of the chassis. I had to take the cores in, so the batteries were taken out.
The wiring was not really well routed and the large round fuse/link shorted, I think it might have set a breaker off? I found it odd that they had two positive leads going to the coach, one with the round fuse/link and the other one direct no fuse or link. The red wire without the link has a yellow tape band around it. I went over to a friend’s 2005 to view its wiring. It has 3 12volt batteries and simply a ground wire and a red positive wire. Mine has the tow 12volt leads coming in… I sure would appreciate any advice or suggestions on getting this figured out. Pictures would be great too.
Thanks,
Bart

[2oldman]

Nice pics.

[Blkbart]

Oh my God, I feel so stupid! I'm used to gas generators, a friend came by and told me to hold the button down longer. IT STARTED! Wow ,an entire day of stress going over and over the wiring the wiring. Chalk this one up to "Stupid Newbie"
Thanks for all of y0ur replies,
Bart
:R :S

[Blkbart]

https://photos.google.com/search/_tra_/photo/AF1QipO46IloxtBVWJJkFciqsnkzBAmL5o9YhrX0rdab

https://photos.google.com/search/_tra_/photo/AF1QipP-amx3KnFpm6yjHvHCtMIQ94su5fhwsLW9ar_r

[Blkbart]

All wires hooked up, terminals all clean, 4 new Trojan T105+ batteries. Inside panel - Chassis/engine 12+ volts - Coach 12+ volts.
Generator will not start?

[wa8yxm]

There was an arc and .. Did you blow the fuse?????

Round fuses are not new to me.

Posibilities are
blown fuse
Batteries connected wrong (Backwards)
switch (Battery disconnect) turned off

ANd last Wrong battery. >Generators often start on the house batteries BUT NOT ALWAYS.

[Kamphiker]

Winnebago / Itasca Wiring Diagrams are available online

003 Journey DL/Horizon P34HD Wiring Diagram Book

[Blkbart]

I will take pictures tomorrow of the round fuse link and the what I suspect are positive leads from the coach/chassis. Does Winnebago/Itasca typically use red cabling for their positive cables? Sure appreciate your help.

[CA_Traveler]

The second wire might go to items that are non switched like smoke alarm or high draw like slides to minimize wire loss. Perhaps the gen as you didn't indicated what else works or not.

Do whatever is required with wiring and different fuse to ensure that that loose round fuse can will never be able to touch ground.

[MEXICOWANDERER]

Before and after images of what YOU did would be even better. 🙂

ROUND fuse just hanging in the wire is something new tp me.