Originally Posted by Hank3
Because the plug in the engine bay is just a drop resistor, not the main control unit for the DRL, which is the unit/clip you unplug behind the glovebox. If you ever go HIDs, you need to disconnect the DRLs completely, not just from the engine bay. If not, you will shorten the life of your HID bulbs as they will come on or flicker with the DRL not being totally disconnected.
Is this also true when using a relay harness for the HID's that merely uses the stock wiring as a means of knowing when to turn on?