I remember someone saying a faulty light switch will affect the guage lights. My left side guages light up (temp,oil,clock etc.) my heater panel lights up, but my speedo and gas guage don't light (most recently the speedo light quit). Could this be due to the switch? I find it unusual that the heater panel lights (all the way across the dash) but the two guages in the middle don't. Thanks in advance.