I have a 2000 blazer 4x4, 4 door LT. I have the automatic headlights with DRL. I did the quad beam mod and added HIDs to my low beams. I didn't want all 4 of my headlights to be on during the day so I bent pin 87 back on the DRL relay. Now only my low beams are on during the day. Sometimes the headlights won't come on at night unless you run high beams or push the dome light override 4 - 8 times, but only sometimes.