Keith,
I would be interested in a 3.7l owner who did that. The electrics I believe in terms of BCU etc are different.
How did you fit the buzzer to both sides? Was it via a common earth off the indicators?
John
John as I remember it was just a case of connecting a wire to the feed of each rear indicator and another to earth. The buzzer I fitted in the spare wheel compartment. When you activate the indicators power goes to the buzzer.