Originally Posted by 97_Leggy_GT
You CAN wire them to the stock horn wires, which join a wire bundle shared by the headlamps - at least on my BD Leggy. That's probably what you're seeing. If there's a relay, then there SHOULD be a wire tapping power from the battery's positive lead as well. Might start by trying to find that wire and trace from there.
This is the ideal wiring setup for the horns. If all else fails, you might just rip out the wiring you've got already and start over. Total cost to you should be about $15-20 for wires and a relay at an auto parts store.
Great, thanks for the tip and diagram! If the wires are ran right into the factory horn wires, wouldn't that provide the power? Which means there wouldn't be a wire running to the battery nor' an "aftermarket" horn relay, as its running off the factory relay/wires?
The relay I'm hearing click is the factory one in the under-hood fuse box (or im assuming) but no sound out of the horns. I haven't had time to look at it much, or test the horns for power. I hate electrical -.-