Read all the threads on horns and still need help.I purchased a set of dual horns at a scap yard from an old Caddy.They have ONE 12ga wire lead coming from one side. I can access the pass. side horn from below but it has a snap on connector with 2 very small wires.I can mount the caddy horns under the hood which will ground them.I touched the 12ga lead to my booster box and they are LOUD.
Is there a way to wire this to the existing horn wiring from the electrical panel rather than cutting into the smaller ga. wire at the existing oem horn.

burnt, you can tap into the wire coming off the fuse box on the driver's side front wheel well. Remove lid. Locate the horn fuse. Remove two hold down bolts. You may need to remove the curved fender brace too. Tilt the fuse box away from you. Find the horn wire coinciding w/ the horn fuse. Tap into here. Re-assemble. Hold your ears:grd: