Quote: Originally Posted by OrAnGe-SrT4
Yes I had some "upgraded light"...And I do realize they use way more wattage and burn hotter. But to go and burn up a stock harness and an upgraded one is kinda weird. I have not looked at the MFS as I do not kno what that is or what it does. The burn marks on mine are just at the connection of the harness and bulb. Maybe I just need to go back to stock bulbs as of now.
When you say it burnt up a upgraded one what was upgraded about it? How was it wired?
A standalone relay harness built properly should not fail.
Yes, anything other than stock wattage and a decent bulb manufacture does not need to be in your car without a proper upgraded relay harness. not doing so can damage stock wiring and possibly the MFS (multi function switch).