I am having some issues and I hope someone can help. I did the brake controller install as suggested on this site and have the following symptoms.

Have left turn signal and brake light on trailer. Have running lights on entire trailer. Have no right side brake lights or right turn signal.

I have verified that this is not a problem with the trailer.

O1, 4.4, with factory tow package and a P3

My wrench thinks it is most likely a lighting control module issue requiring replacement -- not cheap!

Please help!

Thanks!