Not sure how they wired the OP rig, but since it's a 2010, there's a possibility the ground wire for the at circuit is an issue. On my rig, a whole bunch of different grounds come back to a common point on the frame. If one of those connections are corroded (a common problem here on older rigs), that would cause the circuit to stop working.
Maybe a quick slide under the rig and trace some ground connections should be considered.
2019 Redhawk 24B