I agree with bubbles on this one. Hopefully, you have a short in the coax, either at the antenna head or the connection on the plate as those are the easiest and less costly to repair. If it's a short in the antenna's amplifier or a bad switch plate you will have to contend with the dealer's service department and who knows how long that will take.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989
Car Shredder Op/Tech, Scrap Metal Recycling - retired
I deserve hazard pay when camping with my relatives.