Originally Posted by ken99
Netman66 - Can you confirm that I have the canbus or B connector correctly mapped? I was able to find a schematic on the net mapping the main module connector (aka, A connector), but nothing for the small one. I'm using the same logic on the B connector as the A. Since the pink/lg wire has some amperage, I fear connecting it wrong could be disasterous.
Success! The photo shows the correct ITBM pin locations for the harness leads described by Netman66. I found a schematic in Dodge's body builder section labeled "Trailer Tow Module - Brake Provision - ITBM", which was a mistake. The schematic has A3 and A4 labeled backwards, which confused me.
The wires themselves are relatively easy to find, but you must remove the bundling tape wrapped around the harness where it forks for a large bundle routed towards the top of the dash. I found all three wires had small sections wrapped in tape. Removing the tape revealed bear wire. I am guessing these are the spots where the second pigtail is attached on vehicles so equiped. I have t-tapped into the lines and rebundled with tape. I cannot find a source for the small grey connector (which Yazaki part# 7283-5561-40 matches), so for now I will simply use speaker size bayonette crimp connectors on the 3 wires attaching to the controller.
Again thanks to Netman66 for his help.