problem with lights

Hope someone can help, here's my situation. I have a '92YJ and the other day my back-up lights and left hand turn signal lights suddenly stop working. All of the fuses are fine and so are the bulbs. Brake light work fine and so does the right hand turn signal. It's a soft top and there's some condensation with this goofy weather we're having. Could the condensation have shorted something out? Is there something else I should look at? Anyone had this happen to them?