no power to 7 pin

[Kodiaknj]

2021 ram 1500 classic 5.7l .. So im at a loss... All my fuses are good but the only power im getting to my 7 pin is on the "+" blade, none of the others have volts. I plug my camper in and no lights such as trailer tail lights, trailer running lights and trailer turn signals work despite the fuses being fine. All lights on my truck work as they should. RV dealer connected camper to TowDoctor and all the lights came on like they should but, wont when plugged into my truck. I installed an oem trailer brake and flashed it with AlfaOBD and it works great despite the lights not working on camper. Any insight would help as i have no idea what else there is to do. I swapped out 7 pin connector for another and still didn't work. They both have electrical grease and didn't see any corrosion on the connections. What else should i try..

 

[Jim BB]

So when you turn on lets say your turn signals or parking lights and check truck side 7way plug with test light you have NO power the test light does not flash with signal or light up with parking lights on correct!??

 

[Kodiaknj]

so when i turn my lights on truck side and test it with a light meter, only my "+" blade on 7 pin lights up. My trailer brake still works though through 7 pin to the camper wire. camper is all good, had it tested at the dealership so its my truck. no lights at all on camper when my lights on truck are on

 

[chopperman1]

Check the connector behind the bumper.

 

[Tulecreeper]

OK, in your first post you said the only pin that was providing power was your 12v + pin. Then in your above post (post #3) you're saying you are still getting power to your trailer brakes. It's apparent that you are getting power to the plug for at east a couple of your wires. You may have some continuity tracing to do.