Bought new horn, drilled and tapped holes in roof, applied plenty of siilicone sealant, mounted horn. Stood back and admired the nice neat job.
Pressed horn button to be rewarded with a brief and barely audible "ponk" noise.
Many swearwords later, new horn is removed from roof, and 12v power applied direct from socket results in an ear-splitting blast.
Seems to be voltage drop from the parsimonious builder's wiring. Couldn't actually measure it as arms and meter leads not long enough, but all connectors new, bright and shiny so that is the conclusion that I have come to.
Can't get at the wiring as it's all behind the fitout.
I'm thinking of rewiring it to use both conductors as positives, and then use the hull as the return negative.
Seems to me that the total operation time of the horn is probably 30 seconds a year at the most, so it seems unlikely to cause too many problems.
Anyone else done this?
Any BSS issues?
Anyone care to comment?