tailer wiring gremlins.

[BIGRED13]

hey yall, been a while.

 

I have a message that's been coming up in my cluster display saying service trailer brakes... uh no trailer on atm . so I pulled the trailer plug out, inspected for corroision, none found, check for shorts in the 7 pin connector itself no problems, I have continuity through all the 7 pins and the associated 4 pins below, only fault in the trailer brake module was for voltage to low from by battery being dead this morning. im thinking the battery died because of the trailer brake faults. it usually after it rains and then the sun comes out, but this morning was the first time my battery died, anyone else have a problem like this. anyone have a good wiring diagram for modules to the plug on the bumper?