ShapeShifter

[MENTION=129435]White-Out[/MENTION]: I just realized I quoted you twice, it sounds like I was singling you out; I'm sorry, that was not my intention. I tried to make the response generic and not necessarily directed to anybody in particular. It just strikes me as strange that the fear of changing a light bulb would turn somebody off...

I'm not doubting you, but I'm not sure how GM could be providing power to them that would be hard on them. On my '02, the DRLs were controlled by a simple relay via the Body Control Module. The relay turns on when you take it out of Park, and turns off when you turn on the lights or put it in Park. Power doesn't get much simpler and cleaner than that. They redesigned the electrical system in '03, maybe they changed things?

Ain't that the truth!

KP Texan

Okay, the dealer got my interior lights issue straightened out and also enabled the DRLs.

I'm happy know, but I'm not sure what they did different; I wanted to speak with the technician but he was unfortunately out at lunch. I also realized that the DRLs work with the parking brake set, so I was able to put it in neutral and set the parking brake to get out and make sure they were working.

NastyFFX4

iTrader: (1)

I know a lot of guys around here with Chevy / GMC 1500s that deal with burned out DRLs. Can think of at least 3 friends who have 99+ GM 1500s that deal with their DRLs quite often.

Z7What

My DRL only light up in R, N and D they do not light up in P.

I was actually next to the tech reading the screen when he was activating mine. There are many many opinions in the SJB they could have activated something else when tuning in your DRL.

Wayne

ShapeShifter

I was just browsing through the factory service manual, and found this interesting notice in the section dealing with replacing the body control module (BCM.) The comment about flashing interior lights immediately remided me of this thread.

It sounds like they are saying that before replacing a BCM, they should read and save the current settings in the BCM so that they can be loaded into the new BCM. If that's not done, it looks like it won't know about the programmed keys/fobs, and that will trigger the flashing lights rave effect?

Maybe the first time they did the DRL activation, they inadvertently cleared the BCM data? It could be a case where changing the parameters requires the technician to first read the current settings into the scan tool, make the change, and then save the changes to the BCM. If they skip the first step, the learned keys are deleted so the lights start flashing?

It's too late to help you, but maybe this is a clue that can help the next person that has the flashing lights issue?

KP Texan

I think you're really onto something there! I bet that's exactly what happened. I suppose the best course of action is to bring both keys in with you if you are getting your DRLs activated. That way, if they accidentally do something wrong then they have a way to fix it during that visit. I know that they required me to bring my second key in for that final visit....

ShapeShifter

Yes, it sure sounds like that might have been the issue!

That sounds like a good piece of advice. Might be a good idea any time you know your BCM is getting reprogrammed for something.

User-One

Stick a few people in a driving simulator with cars with and without drl and you will quickly find that cars with drl are more noticeable from a distance.

Saw some tard doing 60 in the left lane on a poorly lit highway with moderate traffic with only drl's, should have had his license revoked on the spot.

However overall drl are PROVEN to make a difference.

powerboatr

hey thats me


but my 2010 had auto lamps and drls no problem with either one
if the darkness caused the auto lamps then the drls basically shut down and we had full pulse width headlights

now with the HIDs, the amber turn signals set to high is odd.
why cant we have the fog lamps burn as drls like we could do with the 2002 thru 2004 superduties?

User-One

Because they are probably too low to the ground on the f150.