Dayliner led DRls

RKeeper1 · March 9, 2015

Ive read through thr entire thread on these but that thread is long dead. Is it possible to make these the ONLY DRLs? What im imagining is cutting the wire for DRLs and wiring these up with a resistor I'd imagine due to the lower voltage. Any thoughts?

morrislee · March 9, 2015

You want em off when the main bulb is on? if that is the case, yeah, cut the wire, and use a normally closed relay and if headlights are applying voltage to the relay, cut power to the DRL. it is PIN GH on the 8 pin connector in the back of it.

You have silverado though, I am actually no confused on what LED DRLs you are referring to.....

RKeeper1 · March 9, 2015

Putco dayliner G2s... I want the g2s as my only daylight running lights. I do not want the low beam bulbs on as DRLs anymore. Just the putcos. Id imagine the wire for the stock DRLs can but cut and reattached to the putcos

morrislee · March 9, 2015

which light comes on during day time and which one comes on night time along with the same one? use the power that comes on during the day time, use a relay to shut the line off with the night time signal

RKeeper1 · March 9, 2015

On the silverados, the low beam bulb serves as both but from a wiring diagram in the original thread, there is a seperate wire for the drls going to the same bulb

morrislee · March 9, 2015

Which wire are you talking about? Which page are you looking at on the electrical from gmfitter?

RKeeper1 · March 9, 2015

Sorry, I mixed up two threads. One about disabling the DRLs and one about putcos. Here is the link and the bottom of the page shows a picture of the plug and a few posts down shows what wires are what

http://www.gm-trucks.com/forums/topic/157553-disabling-daytime-running-lights-drl/page-6

FormerFordGuy · March 9, 2015

I've been trying to figure something similar to either disable my DRLs or find a way to send the signal to an aftermarket led drl (dayliner). U fortunately what I've found is there is only one wire going to our low beams (drl). The BCM sends a lower wattage pwm signal through that wire to operate the DRLs and sends a full wattage signal through the same wire to activate lows.

I wish I knew more about electricity/wiring. Need to find a relay that sends the low wattage signal one way (to a resistor to cancel DRLs or to an aftermarket led drl) and sends the higher wattage signal to low beams. I don't know if such an animal exists.

FormerFordGuy · March 9, 2015

Anybody an electrical engineer? Lol

RKeeper1 · March 10, 2015

I must have been looking at a sierra diagram then... that sucks

RKeeper1 · March 12, 2015

If the dealer can disable them from the BCM, which from what ive readthey cant, I could get the aftermarket set to work like normal DRLs with another light sensor

morrislee · March 12, 2015

Get a relay that closes when it is a full voltage, this relay will sit between the original wire to the DRL. This relay will pass power to the low beam when it is at "full voltage" or 12v and not power is given when it falls short of that. To make the LED DRLs you have added to work only in daytime, it is the reverse of what we have just done, the relay we have installed is now a normally open, close when it reach 12v, you should have another end of the relay unattached, LED DRL goes here. So LED gets power when low beam does not, vice versa!

Relay here will be used as a switch strictly, find a separate 12v source for the relay to flip. If you tap into the battery as a direct power source, I would do some sort of voltage spike protection. If you can get RAP to engine bay, then you should use that instead.

FormerFordGuy · March 12, 2015

Get a relay that closes when it is a full voltage, this relay will sit between the original wire to the DRL. This relay will pass power to the low beam when it is at "full voltage" or 12v and not power is given when it falls short of that. To make the LED DRLs you have added to work only in daytime, it is the reverse of what we have just done, the relay we have installed is now a normally open, close when it reach 12v, you should have another end of the relay unattached, LED DRL goes here. So LED gets power when low beam does not, vice versa!

Relay here will be used as a switch strictly, find a separate 12v source for the relay to flip. If you tap into the battery as a direct power source, I would do some sort of voltage spike protection. If you can get RAP to engine bay, then you should use that instead.

That sounds pretty simple in theory.