On my way to the Dr. I used, as usual, this outlet to charge my phone. After leaving, this outlet quit working. Checked all fuses, including interior and engine compartment. Also checked from fuse, both sides, to connector on back of outlet. One side showed open, the other had .7 ohms. Please help!! The other 12 volt receptacle is for my GPS. I'd like this to work like it did before this happened. Any help would be greatly appreciated...