I've done all the googling, and just cannot seem to get this sussed.

I have a 2020 GX460, and I'd like to wire my aux lights to go on/off with the highbeams without cutting into stock wiring. A kit like this from Stedi would seem to do the trick, but the trigger harnesses are not correct for the car. Anyone know a graceful solution ?

Obligatory pic:

 

This won't be much help...

Many years ago I did this on my Excursion (and it still works, as I still own the truck), by building a harness not unlike the Stedi one, if a good bit less elegant. The gist was to use the high beam wire to energize a relay, which then powered the PIAA light lights directly from the battery. (I don't have mine switched any other way than from the high beams). I can take a look at it today, but I'm pretty sure I had to connect to the separate high-beam wire to do it. A 2001 diesel Excursion is a good bit less complex than even a GX, so what I did might not work for you anyway.

As I write this, I wonder if PIAA or another light manufacturer would have a harness that would work?

BTW, prepare to get a lot of hate here from those who don't live where there are few people and lots of critters, and therefore don't understand the need for lots of light when the high beams are on.

Mark

 

Don't overthink this ... your light installation has a control relay ... so simply connect the (positive) control side of the relay to the fuse box ... using a fuse tap to connect into the High Beam circuit. A 16-gauge wire is sufficient given the control side of the relay pulls very little current.

 

OK ... if you say so

 

Tried that. Doesn't work. As near as I can tell, on the 2020, the Highbeam circuit is always high (+12v) and is ground switched. There are products like this CANBUS trigger but.... I'm not going to bet 300 bucks on something that may or may not work.

 

^^ so go +12 on the relay control positive, and switch the relay control ground.