Does anyone out there have a wiring schematic for the ignition switch for a 4th generation Ram that has a key-less entry system?? There are about 6 or 7 wires connected to the thing, but other than the B+ power supply, I cannot determine the function/purpose of the other wires.

Specifically, I want to be able to energize the Accessory/Run circuit.

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

I have not looked at a diagram for our EIS (Electronic Ignition Switch) however it is almost identical to a Mercedes.

Being a Mercedes tech, I can tell you how it functions. Our trucks have an almost identical CAN wiring architecture to some earlier MB's. Basically the EIS confirms code with they key, after this it will transmit via engine CAN to confirm the drive authorization code with the CDI control unit, after this is relayed back to the EIS, the EIS will transmit via Interior CAN to the TIPM (that is what are front fuse box is called righ?). The TIPM then will activate the circuit you are looking for.

So the 6 wires you see are most likely B+(circuit 30), ground (circuit 31), CAN C Hi, CAN C Lo, CAN B Hi, CAN B Lo.