Hi guys, new to the forum and having some issues with the install of the factory brake controller into my 2009 half ton.
I ordered the following parts online:
68146918AA - module
56045795AB - wiring harness
1EB13XDVAA - Bezel
I followed the installation manual (attached) that I found online on forums (great job to the creators of this). I used the Mopar wiring harness and spliced in the 4-prong yazaki connector on the other end - seems straight forward. I also used a yazaki connector for the 3-prong plug and followed the instructions to hard splice in the other end of the connector to the trucks wiring harness. Everything went well and seems good.
Fire the truck up after install, factory controller lights up and seems to get power fine, but I am getting an error message "Sb" and the trailer disconnected light flashes, that's all that it will do. Doing some digging on the internet I find that this code means "short to battery on the brake output". I interpret that this means somehow power is getting to the brakes prior to pushing the brake in the truck. After this error I double checked all of the wiring I did, ensured everything was in the right position which it was. I took out the 4-prong pigtail and tested each connection for continuity and isolation from the other wires, all checks out good. I tested the trailer brake output at the 7-pin plug at the back of the truck to see if it was somehow grounding out, but it has open loop when tested to the ground of the truck. Also with the truck on, whether the brake controller is installed or removed there is 0 volts at the trailer brake output at the back of the truck. This led me to believe that maybe I had a defective module, but swapping it out with one of or 1-ton work trucks the module worked fine, and the 1-ton module flashed the same code in my truck...so the issue is with my truck.
I followed the instruction manual exactly except I did not have any 22awg and 20 awg wires for the 3-prong plug so I just used 16awg that I had readily available and in the right colors. I asked some guys if this would effect the can-bus system and they said no It should be fine with 16awg for this short length. Could this potentially be the issue?
I am going to take apart the 7-pin plug at the back tonight and see if I can find any issues with it, but other than that I don't know what to try.
Any help is greatly appreciated.
Thanks