I make the wire harness from the brake light to the aux switches or BCM, you are correct with the two statements,
"The basic harness, the center cargo light will come on only when you press the cargo light button by the headlight switch (and when you open the doors?), and the side chase lights will come on when you flip the upfitter switch they are tied to correct?
With the reverse harness option, an extra wire ties into the reverse light circuit in the passenger footwell? It provides the same thing as above, but the center cargo light will also come on when shifted into reverse?
If you want to add the Aux switch Functionality to the reverse you need a diode kit. You can reach out to me directly and I can provide the kit. Its very in-expensive and easy to add on. You can reach me at
[email protected] I wish I had time to check the forum more often but I just can't.
Instructions for the install are on my website at LVJMotorsports.com under the links and are availalbe on the GJ Motorsports website. If you have questions please give me a call, I';m here to help. My number is on my website.