95 Ford F250 XLT 4x4. For some reason the park lights won't turn off. I tried taking the knob off the switch (thinking it might not be letting the switch go all the way to "off") and doing anything I could think of with the switch to get them to turn off but no luck. The only thing that has worked so far is to disconnect the battery. I'm leaving today for a 400 mile road trip and I'd like to get this fixed before I go. Any suggestions would be appreciated!