So this post may be a little premature, but I think it's principle is pretty solid. I want to make the fog lights stay on when I turn on my high beams. Right now, if you are driving with the low beams and fog lights, and then flip on your high beams, the fogs will turn off. This is the way they have operated in the past on various GM trucks. And thus there was always a mod that could overcome this. I did the mod on my 2002 Silverado and my 2014 Sierra. Luckily, I think my 2014 Sierra and my new 2017 Colorado have pretty similar electrical systems.
So I dug up an old post on GM-trucks.com by a member who figured out how to make the fog lights stay on with the high beams for the 2014+ trucks. (This post here: Foglights On With High Beams - 2014 / 2015 / 2016 Silverado & Sierra Accessories & Modifications - GM-Trucks.com
I followed a similar path to get the electrical schematics. I went to https://www.gmupfitter.com
and found everything I needed.
So a little background on the way this is accomplished on the 2014+ Sierra's/Silverado's. It's very easy. All you have to do is insert a diode into the pins on the connector that controls the Fog Light Control Relay and the Headlamp Highbeam Control Relay. This connector is housed on the BCM of the 2014+ Sierra's/Silverado's. Once you do this, the BCM gets "confused" and allows the fogs to stay on with the high beams on. Pretty neat. I ran this mod on my 2014 Sierra from July 2014 until July 2016 when I traded it in, and never once had an issue. Many other members on the GM-Trucks forums also did this mod without any issues either.
Now getting back tot he Colorado's/Canyons. Using the electrical schematics I found on GMupfitter.com, I was able to locate the location of the connector that controls the Fog Light Control Relay and the Headlamp Highbeam Control Relay.
They are on the K9 body control module X5 connector. (Same as the Sierra/Silverado). It is a BROWN connector on the BCM unit.
The Fog Lamp Relay Control is pin # 13.
The Headlamp High Beam Relay Control is Pin # 18.
So if my assumptions are correct, this mod could be accomplished by simply inserting a diode (1N4004 type) that jumps from Pin # 13 to Pin # 18. And bingo, the fogs should stay on with the high beams.
Attached to this post is a picture of the connector with the pins circled and the location of the K9 BCM.
So tonight I am going to try this. I am pretty sure I have a leftover diode from when I did this on my Sierra. Should only take a few minutes. I'll be sure to report back with pictures and my results.