Ok it works. I got some big Schotky blocking diodes off Amazon, cut the wire in half and put one in the middle. Now the current can only flow one direction so the headlight relay turns on the fog light relay but the fog light relay can’t turn on the headlight relay. Having it above the fuse box isn’t the cleanest but I’m not going to pull the fuse box to install it underneath until it’s been in awhile and I know it’s safe. I figure if it’s gonna get hot I want to see it and not have it hiding. Once I’m sure I’ll probably pull the fuse box and wire it in permanent. So now the fogs are on with low or high beam automatically and I can turn the fogs on by themselves or with the park lights or with the headlights.
View attachment 250202