Pull the knee / Anit submarine panel off ( this is the panel at the bottom of the dash, under the steering wheel ).
You are looking for the MFS connector, the wires will route up the steering wheel on one side, and towards the dash on the other side.
This is a 16 pin square connector.
You are going to pull up some slack from the truck side of the connector, and zip tie it to the anti submarine panel support bracket when you are done checking the connector pins.
Release the tab on the connector and pull the connector apart, and check the pins pn both sides for discoloration. If there is discoloration, clean with an eraser or emery cloth.
When you put the connector back together, make sure the connector tab will still hold the connector together. You might need to zip tie the connector together, for it to hold ( plastic warped after being pulled for some time ).
This is what another member did to hold the connector together
Edit : The MFS is the turn signal & High / Low / FTP & washer control lever