Anne, check fuse number 47 in the Under-the -hood fuse/relay box for continuity as well as fuse number 9 in the under-dash fuse box. Check your light bulbs, they are dual-filament bulbs (type 7443) 21/5W and are on top of the tailights. Check the Brake Pedal Position Switch, use a multimeter or continuity tester to make sure it is working. If all that is okay, and since both sides are affected, there is a possibility that your Brake Lights failure sensor needs replacement. It should be located at the left rear of the cargo area. Hope this helps, good luck.
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