had the same problem, ended up being in between the firewall, the problem, there is no way to get to it, so I removed the wiper grille and still could not reach it, also if you have a garage, put a work light in the front floorboard inside the truck, turn off the garage lights and just like water, light will follow the least path of resistance and you might find it like that, but in my case had to cut a piece of windshield mount plate, make all the cuts so that after you replace all the trimming you won't be able to see the cuts, hope this helps :wrench: