My 2002 ford ranger has been sitting for about a year without being used much. The 4wd and fog light switche sstopped working and all fuses appear to be okay. We pulled out the front panel and stereo and tested the power to the switches and they are not getting power. The cigarette lighter is pretty corroded from sitting so long but it still gets power I just had to replace the lighter. How can I get my 4wd to work? What's causing the switches to break?

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2002 ford ranger off road xlt. 4 door super cab. V6 4.0 liter. Automatic. 4WD.