1992 Chevy Truck fog and dash lites

Electrical problem
1992 Chevy Truck V8 Four Wheel Drive Automatic 179k miles

after installing some strobe lights my fog lites and my guage lites will not come on. The strobe lites ground to a bolt on the stearing colom and the hot wire is to the fuse box on the fuse that is labels cts(i think im not colpleatly shure) its the fuse that blows wen wires tuch wile installing my pioneer headunit. And the ground and power wires for my cb radio are in the exact same places. Any answers on why the fog and dashlites will not come on? Your help would be much appreciated