Now My DRLs Are Out.

[Mater]

could be a loose connection and the testing you did just reseated every thing.

the metal part of the connectors can loose tension after a wile

 

[Mean_Green]

I've checked them a few times in recent days and they worked. Checked this morning before I headed out and they worked. But sometime during the day, they stopped. Beginning to wonder if that diode block is failing.

 

[Mean_Green]

Could this stuff have somehow gotten turned off or altered in programming if the PCM was affected?


Both the DRLs and the Interior Courtesy Lights?

 

[jayburn22]

I can't remember them ever working on our 2001 Tahoe.. I recently installed a new headlight assembly and put all new bulbs in.

The side-markers were both dead, I replaced them with 2 cheap LEDs I had laying around. They are working 100% now.

I put two new "orange/amber" blinker bulbs in and they are working 100%.. the left one was faded and cracked and w/ this clear assembly I just wanted to be safe.

As for the DRLs I even put two new bulbs in each and neither work.. I honestly did not try much to resolve the issue outside a few things already suggested.

Oh well, she's an old truck and not too worried.. Been more concerned about standard bulbs vs LEDs. I got a super cheap set and the high-beam (9005s) work great, not as bright as I hoped but better than what I had.

I was going to fiddle around more but I gave up, I just hope the blinkers & side-markers last awhile as these aftermarket assembly's are a pain in the rear to pop in and out. I have to loosen the grill just to pop out the driver-side headlight assembly, not difficult but annoying.