I am having minor electrical issues with my 2004 Pontiac. The gauges act up but eventually go back to normal. Sometimes when I open the doors the radio doesn't turn off or the interior light doesn't come on. Sometimes the headlights don't operate on daytime mode but work fine on manual mode. I have checked the battery cable for corrosion. I also read online that sometimes the battery cable could be faulty. I need to know if this can lead to further issues or if anyone knows of a solution. I know electrical issues can be complicated and costly.