24V 60 Series Voltage Reg Problem? (1 Viewer)

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Joined
Oct 10, 2025
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Perth
Hey guys,
I've got a 24v Japanese import 1986 2H 60 series with one of the 2 12v in series batteries constantly going dead (just completely drains yet the other battery stays at 100%)
The battery light is staying on yet my alternator seems to be working.

I tested for a parasitic drain but I don't think I have one, yet if I leave my car sitting for a few days, one of the batteries will go flat.

My mate reckons the voltage regulator might be the culprit. It's a small external unit I've attached a picture of.

I cant seem to find that unit number (RGX 2028) anywhere online, I think it was an old ashdown ingram part number but they cant seem to help me.

Do you guys know what part I should buy? This one looks pretty close, just want to make sure.


My alternator unit number is 27030-68120

Would greatly appreciate anyone pointing me in the right direction... maybe it's not even the regulator?

PXL_20250810_095548458.webp
 

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