What does your electrical load look like, stock? Sounds like maybe a combo of the expected low rpm charging and some resistance due to age may be dropping the voltage to the flasher enough to keep from operating.


1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
2020 RAM 1500
[img]https://i.imgur.com/v9yezP9.jpg[/img]