i have 2 2004 f-150's. one is a work truck 2wd xl. the other is a 4wd fx4 with the sport package guages. both trucks have a mesage center. my personal truck has the compass and outside temp showing all the time, but the backlight is not working. my company truck message center lights green all the time and dims a little when the lights are turned on. does anyone know if there is a bulb behind there that needs to be replaced.