This bulletin applies to 2010 Ram track 1500 and 2500 models. The left turn signal for a connected trailer may be inoperative due to excessive silicone on the seven-way trailer tow connector, terminal #1.
In the seven-way connector, locate terminal #1 (upper left). Refer to the detailed drawing available in DealerConnect > TechConnect under Wiring>Trailer Tow>Component End Views>Wiring Trailer Tow 7 way.
Using a suitable tool, such as a straight blade Exacto knife, scrape the silicone off of the outside of the #1 left terminal.