CAN-BUS Wiring Harness Fits Chrysler Dodge Jeep Radio Apr 18, 2017This wiring harness allows to installation a aftermarket radio into a Chrysler/Dodge or Jeep that has a factory Can Bus radio Fits models REF, REC, RAQ and RAK, found on the front of the radio Retains all necessary safety, warning features and maintains the factory can bus system without any check engine lights.4/4(9)Price: $65 CAN BUS wire harness | DODGE RAM FORUM Apr 15, 2016If I am going to install an aftermarket radio in my RAM do I need the CAN BUS interface wire harness. I have the 4 speaker system with no Navigation or Infinity amp??? They want an awful lot for that damn harness. Just curius. Thanks.