Great question, from the start, all I did was replace the bulb on the right side signal , for the hood scoop harness. I will say that there are small white plastic inserts - spacers - ? and one had fallen out. I put it back and made sure the bulb fit snuggly in there. That's when I turned the key on and instantly the right turn signal started flashing repeatedly, but NO sound of the flasher. I then turned the key off, went out to pull the socket out of the right side hood scoop indicator, and it was WARM! When I inspected the socket, it looks like the metal button connector down in the socket, the part that touches the bottom of the bulb, looked like it could have been touching the wall of the socket? Other than that I have now idea what happen, and therefore feel the harness is defective. I will be contacting them, hopefully today to discuss. It is a $40 harness, one would hope it is made properly.