Disconnect the alternator (it's the easiest). Sounds like there's a short, either in the voltage regulator or the alternator. I believe you would have an external regulator on yours.

Mike: The clock only draws when it's winding, which takes about a second, and only does it once every few minutes.

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2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

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1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k