So I just purchased an '04 Suburban and noticed my DRL's aren't on when driving but only when locking and unlocking. What gives??

 

they will only come on with the engine running and the trans in drive so if you put it in park and walk around to see if they are on...they won't be.

 

Put truck in drive and nothing. Still no DRL's

 

to confirm...these are the lights in question


the reason i ask is that my 2000 dtrl do not flash with the fob, the signal lights do.

so if you confirmed both bulbs are good the next step is to check power and grd at the bulb connectors. If no power, check the drl fuse and relay in the underhood fuse box. remove the relay and jumper power to the bulbs. if the lights come on the issue is with the relay or relay control at the bcm/bcm wire tothe relay.

 

Those are the bulbs in question. I locked the truck at night with light switch on "Auto" and they lit up. This morning in daylight they did not light up upon locking truck. Don't know if that has anything to do with it at all but I have verified the bulbs are good. Next step I guess is looking at fuses.

 

Do any of the lights come on with the truck in drive?

 

Headlights do when dark. Literally just bought it last night so haven't had much time to mess with it yet.