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April 14, 2026 Service bulletin

Warning

Ram technical service bulletin 9100799 for 2019-2026 Ram 1500.

Bulletin number
9100799
Component
Electrical system
Summary
WARNING: Shorting the 48V output stud to the 12V output stud can cause immediate and irreversible damage to the power pack unit. Always use insulated tools and protective stud covers when performing service operations. NOTE: A loose or high resistance ground connection may result in abnormal voltage behavior and can increase the risk of electrical component damage. Always verify ground integrity before system power up. For P0AFA repair: Please follow the Service library steps 1 through 7 without fail. Only replace PPU or MGU after verifying the final step of the procedure.

Owners of these vehicles have filed 1,297 complaints in the electrical category.

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