Nothing too difficult, or earth shattering here. Just thought I'd take some pics along the way to try to help the visual learners. I basically followed Grif's lead, and copied what he did. Why mess with perfection?
First, I removed the left and right top Tupperware. You may not need to remove the left-side . . . but that's where my front fuse-block lives.
On the right-side of the GT, you'll find the ECU is in the way of getting to the OEM horn's wiring. Only two screws need removed to get it out of your way, so why not?
Looking at this next pic should help you find the OEM horn's wiring...
The OEM horn's connector is just behind that wiring loom.
I used a small flat screwdriver to release the OEM horn's connector.
Next, cut some of the tape back. Just be careful!!!
Here's the OEM horn's leads exposed. Green
wire is positive. Brown
wire is ground (always
on these BMWs).
I soldered a wire onto the OEM horn's positive lead. This new wire will trip the relay to the Stebel horn when the horn button is pressed. Make sense?
Here's the new horn's final resting place. I had to move it a little to make sure that the Tupperware could be reinstalled.
I like the end result a LOT. More than I thought I would. It's loud, but not too loud, IMHO. I especially like the way you can hear the GT's OEM horn first for about a 10th of a second, then the Stebel comes blasting through. Kind of a cool mix between "meep
" and "HONK!!!
I hope these pics are helpful.