I've searched but all I found were either answers to '96-99 Tahoes, or posts about DRL's that went unanswered. I keep thinking I already posted a thread on this but I can't find it, so I'll go ahead and ask.

The DRL's on our 2002 Tahoe do not work, I can't seem to find what the problem is. The bulbs are new, the fuse is not blown. I don't know where the relay box is so that might be the problem, I also don't know how to tell if that is the case.

Any info?

Thanks
-Zach

 

Try starting the vehicle and make sure the parking brake is off?

 

Check the DRL relay. It is in the fuse compartment under the hood. It is powered by 2 fuses. The DRL relay gets its turn on comand from the BCM.

 

In2pro, parking brake is off. In fact I don't think we've used it yet.

Charlie, thanks I will look for it. Is it labeled on the diagram on the cover of the fuse box?

 

Found the relay and swapped it with the horn's relay [had same numbers on top and same number of prongs]. The horn still worked, meaning that the DRL relay was not faulty, however the DRL's still did not work.

 

My nieces 03 Suburban had the same issue I replaced the bulbs and never could figure it out why the didnt work.
next time I saw her vehicle they were working but it was running, she didnt have anything done to it other then I never tried fully starting the vehicle when I was troubleshooting.

 

try putting the truck in gear...