Scag Diesel alternator good not charging

If the alternator is good but not charging, the issue could be with the **voltage regulator**, wiring connections, or a blown fuse. Start by checking the wiring for loose connections or corrosion, and make sure the belt driving the alternator is tight. If everything looks fine, test the voltage regulator, as it's a common failure point. Replacing it might solve the charging problem.
 
How did you determine the alternator is good?

Where is the main charge wire from the alternator connected, the large one?

The basic system requires, the switch completes the charge excite circuit, and the voltage regulator works.

Ideally, you need a manual to troubleshoot these kinds of problems. Silver bullets often misfire.
 
I cant find the voltage regulator physically or on the electrical schematic had the alternator tested at a place that repairs them. Old man in a old shop im sure he knew what he was doing
 
Tnx for the model and serial. In this case I can't help as I don't have an account with Caterpillar so they won't let me look up the engine.
 
StarTech said:
Tnx for the model and serial. In this case I can't help as I don't have an account with Caterpillar so they won't let me look up the engine.
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I called holt caterpillar in Fort Worth Texas. What’s happening is cat says I need to call scag and scag says I need to call cat. The scag dealers all say they don’t work on the diesels. This issue originated over 5 years ago and I bought a Ferris mower. I want to sell the scag so I want to get everything in top condition which I have done. Only 420 hours on this machine. New parts every where. Just cant seem to solve this issue. Thank You for trying.
 
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