ALT

Thanks. Yes, the OEM incandescent bulbs worked fine. I just wanted to upgrade the bulbs to LED because they are brighter and lite up faster. I found the solution to this which is to add a load resistor for each bulb or buy the LED bulb with the build-in resistor. BTW, the brake light bulb type for 05 SC430 is 7443.

2005 SC430 bulb replacement warning light on after installing LED break light bulbs. Anyone know how to fix this problem? Thanks.