Problems with Daytime Running Lamps

I have noticed that my DRL's are no longer working in the daytime when driving my 99 Pontiac Gran Prix GT, but the sensor part still activates the lights on at night. I have checked the fuses and all are okay, also have checked the wiring on the drivers side panel to make sure wires are plugged in securely. I am asking for any suggestions or solutions to this problem. Thanks

You did check the DRL fuse too ??

Check the DRL relay, its probly shot.