View 5 Photos View 0 Videos Cummins ISX Wiring Harness for a 2014 Peterbilt 389 $995 USD CAB TO ENGINE HARNESS/ PETERBILT CAB TO CM570 ENGINE HARNESS KUSTOM TRUCK P/N IS NAMUX3, NOT SURE THE MANUFACTURE OF THIS HARNESS...., Serial#: na, Core Charge: na, Casting#: NA ConditionUsedFits To Make(s)PeterbiltFits To Model(s)389Will Fit Year(s)2014Part NumberNAMUX3Stock Number22626-20 MLS Number14247842CategoryWiring Harnesses Last Updated3/17/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info