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Re: Need OEM wiring diagram for 2012 Pete Aftertreatment Module
Posted to HD/Fleet Forum on 4/13/2025

Here is what I find for what pins are switched versus constant power.

On the ACM 53 pin connector pins 1,2,3,4,5 are grounds 6,7,8,9 are constant power feed by a 20 amp fuse and pin 52 is a ign switched power fed by a 5 amp fuse. Login to read more.