possible alternate DRL disable

[pheonix11204]

Hey guys, i was searching the web last week for a different way of disabling the DRL in the 9th gen corolla for HID use, last week i found something interesting on the 9thgencorolla.com forum

well apparantly you can disable the DRL without losing the autofunction by snipping the DRL harness and then grounding the negative wire. Well atleast thats what I got from the website, Sucks that it went down, i could of linked the actual DIY. He mentioned that if you ground the DRL harness you will trick the ECU/DRL into sending a steady current instead of the weird square wave voltage of the DRL function in the 9th gen corolla.

My issue is that I have no idea what the hell the guy did, he soldered a ground wire to the DRL harness then grounded it, there were a bunch of confirmations on the website stating it worked beautifully. I just wish I can figure out how to do it. Anyone have any possible ideas

p.s. i still remember the wiring diagram he drew up. will post it later... any ideas?

[pheonix11204]

aww, cmon guys any ideas at all, I think I might just do the snipping of the DRL module... just wondering if this fix might be a bit better... BTW I have an 04 corolla, can i just cut the 12pin number wire on the module, instead of cutting the yellow wire and grounding the DRL module.

[gold94corolla]

I posted in the wrong thread lol.

[SuperchargedMR2]

Originally Posted by pheonix11204

Hey guys, i was searching the web last week for a different way of disabling the DRL in the 9th gen corolla for HID use, last week i found something interesting on the 9thgencorolla.com forum

well apparantly you can disable the DRL without losing the autofunction by snipping the DRL harness and then grounding the negative wire. Well atleast thats what I got from the website, Sucks that it went down, i could of linked the actual DIY. He mentioned that if you ground the DRL harness you will trick the ECU/DRL into sending a steady current instead of the weird square wave voltage of the DRL function in the 9th gen corolla.

My issue is that I have no idea what the hell the guy did, he soldered a ground wire to the DRL harness then grounded it, there were a bunch of confirmations on the website stating it worked beautifully. I just wish I can figure out how to do it. Anyone have any possible ideas

p.s. i still remember the wiring diagram he drew up. will post it later... any ideas?

This sounds similar to the mod for the 10th gen DRL disable.

DIY: Disable DRL / Autolights and/or Independent Fog Light Mod w/ Pics

[pheonix11204]

Originally Posted by SuperchargedMR2

This sounds similar to the mod for the 10th gen DRL disable.

But I have a 9th gen corolla, do you think i can do the same mod? I dont even think i have the module like that behind the glove box. I read the mod in the 10th gen corolla, dont really understand if it could help me or not, my DRL are on the low beam. Is it the case the module in the 10th gen corolla is in the glovebox while my is in the drivers side, and i could do the same thing... Honestly that post confused me... Any pointers? I think im just going to kill the DRL by snipping the yellow wire and disabling everything...

[Dommm]

Both the yellow wire and pin 12(red and white wire) method work the same way. I did the red and white wire method because it didn't require grounding. Just tape it with electrical tape and you're set.

[pheonix11204]

Originally Posted by Dommm

Both the yellow wire and pin 12(red and white wire) method work the same way. I did the red and white wire method because it didn't require grounding. Just tape it with electrical tape and you're set.

Thanks for that, I will try it out, I read somewhere that it only works on model years from 05 to 07, for some reason I think i have to ground the whole box. none the less im going to try to cut the red and white wire and see if that works.

[Stellacotton]

Originally Posted by Dommm

Both the yellow wire and pin 12(red and white wire) method work the same way. I did the red and white wire method because it didn't require grounding. Just tape it with electrical tape and you're set.

I did the same thing Dommm. I'm a member of 9Th Gen but joined this forum today because we now also own a Highlander Hybrid and this forum has a great Highlander section.

[pheonix11204]

Just snipped the #12 red and white wire on the day time running light relay box and it worked, so i guess it works also for 04 models as well. Thanks all

[gte]

That was me

You just ground the headlight ground wire, it's that simple.

There isn't much to figure out, as you said you just solder a wire to the ground wire and ground it to the chassis.

It doesn't trick the ECU, it removes the pulsed ground signal and substitutes a permanent one.

What do you want to know?

Originally Posted by pheonix11204

Hey guys, i was searching the web last week for a different way of disabling the DRL in the 9th gen corolla for HID use, last week i found something interesting on the 9thgencorolla.com forum

well apparantly you can disable the DRL without losing the autofunction by snipping the DRL harness and then grounding the negative wire. Well atleast thats what I got from the website, Sucks that it went down, i could of linked the actual DIY. He mentioned that if you ground the DRL harness you will trick the ECU/DRL into sending a steady current instead of the weird square wave voltage of the DRL function in the 9th gen corolla.

My issue is that I have no idea what the hell the guy did, he soldered a ground wire to the DRL harness then grounded it, there were a bunch of confirmations on the website stating it worked beautifully. I just wish I can figure out how to do it. Anyone have any possible ideas

p.s. i still remember the wiring diagram he drew up. will post it later... any ideas?

[pheonix11204]

Originally Posted by gte

That was me

You just ground the headlight ground wire, it's that simple.

There isn't much to figure out, as you said you just solder a wire to the ground wire and ground it to the chassis.

It doesn't trick the ECU, it removes the pulsed ground signal and substitutes a permanent one.

What do you want to know?

I wish you posted a couple of days earlier, I just snipped the #12 red/white wire to fully disable the DRL function. but thanks anyway, i think im going to either wire in a switch or just reattach the 12 wire and try this mod. I'll try it out after the holiday, right before school gets insane. Thanks a lot, I didnt realize it was that easy with the grounding technique should of done it....

[gte]

Alright well if you have any questions, just post here ... or maybe 9thgen will be back up by then?

Originally Posted by pheonix11204

I wish you posted a couple of days earlier, I just snipped the #12 red/white wire to fully disable the DRL function. but thanks anyway, i think im going to either wire in a switch or just reattach the 12 wire and try this mod. I'll try it out after the holiday, right before school gets insane. Thanks a lot, I didnt realize it was that easy with the grounding technique should of done it....

[gambit023]

Originally Posted by gte

That was me

You just ground the headlight ground wire, it's that simple.

There isn't much to figure out, as you said you just solder a wire to the ground wire and ground it to the chassis.

It doesn't trick the ECU, it removes the pulsed ground signal and substitutes a permanent one.

What do you want to know?

GTE - if you ground the headlight ground (yellow wire) then will you retain the auto-light functionality but disable only the DRL?

[gte]

I don't remember the color of the wire off of the top of my head, but yes you will retain the auto-light feature.

Originally Posted by gambit023

GTE - if you ground the headlight ground (yellow wire) then will you retain the auto-light functionality but disable only the DRL?