Need wire diagram for Miller big 20 sn.jb505827

See attachment, item 9.

Go to

https://www.millerwelds.com/support/manuals-and-parts.

Enter Model/SN and download owners manual. Diagrams and parts lists are in the manual.

Check all fuses with an ohm meter for continuity.

This may be useful;
https://www.manualslib.com/manual/103859/Miller-Electric-Big-40g.html

The battery is not being charged due to a failure in the alternator or the wiring.

The wiring diagram for the charging system on a Miller Aead-200le Constant Current AC/DC Arc Welding Generator Gas Powered will be provided in the operator's manual for the machine. The manual will have detailed information on the wiring diagram of the charging system, including the connection and function of the starter under the flywheel.
It's important to refer to this manual for specific instructions and guidelines for the wiring diagram of the charging system. You can find the manual on the Miller website or you can contact Miller Electric and request a copy of the manual.
If you cannot find the manual or if you are not familiar with reading wiring diagrams, it's best to take your welder to a qualified Miller Electric welder repair service center, they will be able to provide you with the necessary information and help you troubleshoot the issue.

The number and location of connection points on a Miller welder when removing the welder and motor from its casing will depend on the specific model and year of the machine you have.
Here are a few things you can try:

1. Check the manual of the welder, it should have a wiring diagram that shows the number and location of connection points on the welder.
2. If you don't have the manual, you can find wiring diagrams for most Miller welders on the Miller website, you can download it from there.
3. If you are not able to find the wiring diagram for your specific welder model, it may be necessary to contact Miller Electric and request a copy.
4. If you are not familiar with reading wiring diagrams or if you are not comfortable working with electrical equipment, it is best to take your welder to a qualified Miller Electric welder repair service center, they will be able to provide you with the necessary information and help you troubleshoot the issue.

Please note that some models may have different ways of wiring, it's important to refer to the manual or consult with the manufacturer for further information.

Miller - Owners Manuals

There were a number of versions that bore that name. I rebuilt a board on one and found that out. Fortunately the differences were easily identifiable.

go to the miller website and download the manual. the scematic is in the manual

i have a old miller thunderbolt CC*AC/DC welder its wire single phase 480 can it be switched to 220 single phase

Go to Milwaukeetool.com and under service/manuals you can type in your model number and download the wiring schematic for this tool. If I have helped you with your request would you please rate this response accordingly and thank you.

diagram is on the inside of cover or go to Millerwelds.com