[CrazyAirborne]

Do you have to drill a hole in the bumper to route the wire?

only directly behind the light, so it would be completely hidden if you ever changed it back to stock or otherwise.

 

[Hank]

So, I ended up doing something completely different. I can't post the final solution just yet as I'm waiting for silicone to cure on the driver's side reflector. However, I can tell the group that I cut open each factory reflector and inserted a Diode Dynamics 6" HD Red LED strip inside it. LOOKS AMAZING! 3 year warranty too. Did I mention that I didn't have to remove the rear bumper OR the tail lights? 😝 I tried to find a plug-n-play harness, but I struck out. The one I purchased from Amazon must only be for the Corolla sedan. I did find the part number of the factory tail light harness connector while making this modification, but the only one that comes up in an internet search has negative feedback because the seller ships something totally different. Instead, I had to solder my LED strips inside the hatch area wiring.

Here's a teaser shot of the passenger side with running lights on. It looks factory (solid bar of light) unlike the multiple LED strip variants that have many points of bright light.

 

[Ozymandias]

Looks really good, do you have some build/assembly pics you can share?

 

[Hank]

Looks really good, do you have some build/assembly pics you can share?

Here's a direct link to my build thread post #18 with all of the details for my LED Rear Bumper Reflector install.

Total of (84) annotated pictures can be found in the LED Rear Bumper Reflector modification page on my personal GR website, and this can guide someone through the entire process of this modification.

 

[CrazyAirborne]

Love this, really hope a company like DD would start making something high quality like this! you should share your work with them and let them know there is a big demand for this!

Here's a direct link to my build thread post #18 with all of the details for my LED Rear Bumper Reflector install.

Total of (84) annotated pictures can be found in the LED Rear Bumper Reflector modification page on my personal GR website, and this can guide someone through the entire process of this modification.

 

[dish_cloth]

@centerpunch I have seen you post part schematics on other threads. Are these from TIS? or can you get them for free elsewhere? I did a quick search but couldn't find any service manuals for free online.

Here are the part numbers for the XSE hatchback. they do not have the GRC listed yet on the genuine parts website. View attachment 6353
View attachment 6354

Was it ever confirmed if these part numbers are the same for the GRC?

 

[hatchbacksR4grandmas]

Was it ever confirmed if these part numbers are the same for the GRC?

They are different.

 

[GRCE03]

The factory wiring uses Red for brakes, Blue for running lights, Black for Ground (and I think Yellow for turn). The aftermarket LED-reflectors use Red for brakes, White for running lights, Black for Ground.

I wired up my set only to the brakelight circuit for maximum contrast at night. I pulled out the carpet trim in the hatch area just enough to access the back side of the taillight harness and tapped into it there, that way all of my splices are on the inside and not exposed to the elements. I ran the new wires through the two large grommets on the rear wall behind the license plate. I used a Deutsch connector so I can easily disconnect the mod if I decide it's too much.

Here's a brake test at night, pardon the messy garage.

View attachment 19378

Hi! just for my own education, how did you figure out which wire does what?

Ive been trying to figure out what each color means but I cant seem to find it unless I just completely overlooked the manual or what hehe

Thanks for the info btw! really helped a lot

 

[GRConnoisseur]

Anyone found out the part numbers to make a harness to split the brake light to add the reflector lights? I've seen someone on the youtubes do it but no part #'s. I'm looking into it myself but just thought I'd ask first.. thanks

 

[Alpheamus]

Hi! just for my own education, how did you figure out which wire does what?

Ive been trying to figure out what each color means but I cant seem to find it unless I just completely overlooked the manual or what hehe

Thanks for the info btw! really helped a lot

I know this is an old comment, and I'm no professional nor have I ever done this, but if I understand/remember correctly, I believe you need a voltmeter, and you just hook it up to the wires and check when each wire voltage reading increases during what action.

E.g. red wire reads higher voltage when brakes pressed, and doesn't when brakes are not pressed, etc.