Fog Lamp circuit breaker pops. Why?, Haven't a clue where to start Options

[Rav914]

Short background: I installed a set of Hella 500's on a car that didn't have fogs to begin with. I decided to follow the directions that came with the lamps. It didn't work. I just burnt up a wire (now repaired) and wasted my time.

So...I bought an OE switch and connected the lights to the wires already in the car.

Connections:
Black wire on lamps to the yellow and white wires from the car.
Blue wires on lamp (ground) to brown ground.

K on switch to gray/red.
31 on switch to brown ground.
15 on switch to brown/blue

on the CB panel I see the red/black, gray/red, white/blue, and white/yellow wires taped together and go under a black relay.

I'm assuming all is good. But when I turn on the lights and pull the fog light switch, the lights dim momentarily and then "snap", the CB pops.

What am I missing? Do I need to install the relay that came with the lights? I'm so bad with electronics, I don't even know where to start. Except that I checked and cleaned all grounds. I checked and traced all wires - no issues. (IMG:style_emoticons/default/sad.gif)