I'm posting this to help any other members. There are several old threads I wanted to add onto but were locked.
Truck: 2006 2wd ,4 door, short bed, cummins, 6spd. Truck was a factory tow package (I believe they all are this new).
Symptoms: right trailer blinker and trailer brakes not working
RF turn signal not working
windshield washers not working
left rear truck running lights only not working
fuel level/guage intermitten readings
dropping out speedometer
As anyone can see this list is long and the repairs took much longer. To make a long story short: verified power for trailer light, windshield washer, brakes and LR tail light had no power from TIPM. Replaced and codes cleared.
Broken washer line and bad bulb all in RF after verified TIPM issue.
brake/abs (lights on) and left rear tail light still were in operable, verified power from tipm. All trailer stuff worked 100%
The factory connector behind the LF wheel well was faulty. Upon inspection the connector was in good shape. NO water or dirt intrusion and secure clamp connector. BUT over a very bumpy (dirt) road things still worked intermittenly. I by-passed and hard wired the connector and everything is 100% good. Just wanted to share with everyone.