initial

I recently did the GSF taillight conversion on my 2013 GS. My buddy did all of the wiring and everything looks good; he used a couple threads on here that guided him through the process and also took a look at the diagram on the back of inner taillights to do the wiring. He did everything within 15 minutes no hiccup. Brake lights, reverse lights, and blinkers all work. I've seen a few videos of GSF's recently and wasnt sure if the inner taillights are supposed to light up when I hit the brakes. The outers light up of course when I hit the brakes; not sure if it's the lighting of the videos or what, but it looks like the inners are supposed to light up when I hit the brakes. A few other videos I saw, the GSF's inners didn't light up when hitting the brake pedal, so I'm not sure what the case may be. A video of the taillights in action would be helpful. @peasodos I need your guidance oh great one.

peasodos

iTrader: (1)

There is a pin on the inner tail lights you can wire so they also light up when you brake. What you have to do is jump the pins on both inner tail lights together and run a long wire to the brake light on the outer tail light.
The pin for the brake light on the inner tail is going to be the one you don't have anything connected too(I think it's the red wire on the tail itself) and I believe the brake light wire on the outer tail light harness is the solid white wire.

I think by default in the USA for the 2016+ GS don't have the inner tail brake light connected, but in other markets they do. Someone with a 2016+ GS can confirm by testing out their brakes. I wired the brake light on my inner tails, looks better imo.

jgscott

iTrader: (1)

Can this be done also on the GS Non F lights 2016 - 2020 too? That is a nice find. I never saw anything here on CL about this before?

peasodos

iTrader: (1)

Yes, should be able too, although the color of the outer brake light wire I mentioned might be different, since I'm referring to 2013-2015 GS tail harness.

initial

@peasodos how did you run the wire from inners to the outer taillights? I'm trying to figure how to run it through the trunk

peasodos

iTrader: (1)

run/ziptie the wire along the trunk arm/hinge, leave a foot slack at the end and then behind the trunk liner to the tail lights. The part you leave the slack you also want to zip tie it somewhere in the trunk. You need the slack so there is enough wire to not interfere with open/closing the trunk.

initial

Oh man, this is gonna be a game of "how do i make this clean" lol

lexus4jess

I thought all 2016-20 GS models (GS350 , GS350 F-Sport and GS-F) had the inners light turn on with the brake light applied. Did you have someone apply the brake and check if the inners light up?

jgscott

iTrader: (1)

Yes we did 2 cars. My 13 Lux and a 15 F Sport. Neither lit the inner light on the Brakes.