JDMarshal

so i ordered these ebay k2 motor fog lights for a 95 civic and i tried to wire them up ive got a battery wire, ground, switch, and a yellow wire which i plugged into the under dash fuse box and all of these go to a relay which goes to the fog lights which have one more ground. the fog lights did turn on once when i turned on the key but then a wire started smoking and they havent turned on since. so what would cause that to happen did i wire something wrong or is it a faulty product