if it wasnt for the reduced distance visibility id install a 4hi mod plate to my fuse box for a chevy truck (I think they can be made to work for the cars), but id want to be able to select which it does as well in the cabin
but yes i frequently have my Flash to pass held on my truck and park avenue , my truck didnt come with fog lamps im looking into making that work with different lamps that point outwards
Depending on whether I understand you fully, that should be a very simple mod that can be reversible if/when you felt like removing the mod and restoring it to stock function.
The question would then be if you want it to not cut any stock wires, or allow them to be cut. The reason for cutting them would be to introduce in-line Deutcsh or WeatherPak plugs. This would allow the mod to be removed and then plug in the plugs to put it back to "stock", except for the new plugs being there. Functionally, it would still be stock. If you want no wires cut, then that may take a bit more ingenuity, but it's still possible.
The module that would plug in between the new plugs (either semi-stock or fully stock) would allow you full control. We would just need to decide what kind of control you'd want.
As a side note, I have a pair of fog lights on the front on my 2005 LeSabre that act as DRLs instead of my headlights. All I had to do was to find the DRL relay, bend one leg up, then solder a wire to it and run it to the lights. However, it's not as clean as I would like, so when the temps are not so cold, and after I get some other items off my list for my other vehicles and my home, I plan to do it better. It was a quick-and-dirty solution for an immediate need and I plan to make it better.
My plan involves being able to plug in a small base where the relay sits, then plug the relay into that base. The base would allow me to select which wire(s) to intercept. However, I just can't find what I'm looking for, but I've come close. There are Relay Bypass Switch kits, with and without diagnostic loops, but they are for temporary use and are just manual switches in place of the contacts for the relay.