Timmeh

In regards to the dude in the car with Queensland rego - can a WA cop sticker your car if you have a queensland registered car? I was thinking about buying a car from VIC and getting a relative to pay my rego for me, and Id keep the car here in Perth. Is this a feasible way to avoid yellow stickers?

Check the fuse first. Change it out (even if it looks ok). If that doesnt solve it then : The one wire on your boss kit is a positive wire that links up to your horn. There is no negative wire, because your car is negative earthed, and so doesnt need it. To be honest it doesnt sound like an issue at the steering wheel end. Just get a test pen and check that the single wire has power going to it. If the single wire has power going to it, then you'd check the horn side of things. Pull the wire off the horn and check it isnt corroded etc. Then get a test pen / multimeter and bridge between that wire and the body of the car. Get someone to press the horn inside the car and check that the wire is getting 12 volts. If it isnt theres a wiring / fuse issue. If it is, but you connect the wire back up to the horn and no go, then the horn is stuffed. Hope that helps a bit.