flyingbrick Posted March 14, 2015 Share Posted March 14, 2015 OK, I have everything major sorted except this damn horn. It is driving me fuckin mad. The horn contact pin thing is energized with 12v. There is nothing obviously fucked in the loom and everything I have done is on plugs and disconnected. There's no horn or anything connected to the loom that could cause this. My car was missing the horn contact ring thing from behind the steering wheel-i do wonder if they pulled it out for this reason. Any ideas? Its got me fucked. Quote Link to comment Share on other sites More sharing options...
DB8-TypeR Posted March 14, 2015 Share Posted March 14, 2015 So the horn goes off all the time? The pin should be energized then when you press the button it connects to ground and completes the circuit. Is the button stuffed? 1 Quote Link to comment Share on other sites More sharing options...
KKtrips Posted March 14, 2015 Share Posted March 14, 2015 Probably the fact that you have no earth so if it has no earth then it becomes live by the other side of the horn being connected to 12V. Quote Link to comment Share on other sites More sharing options...
KKtrips Posted March 14, 2015 Share Posted March 14, 2015 So the horn goes off all the time? The pin should be energized then when you press the button it connects to ground and completes the circuit. Is the button stuffed? Yes this is better than my explanation Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted March 14, 2015 Author Share Posted March 14, 2015 There is no horn..the wire that should go to the negative side of the horn is not connected to anything at all. People use the word "back feed" and it makes no sense to me. I had a think in the shower and decided that I should just cut the wire in the dash (that's live when it shouldn't be)and run my own from column to relay (in engine bay which is set up for negative switching... Once again it was isolated completely during this trouble shooting) Thanks all Quote Link to comment Share on other sites More sharing options...
h4nd Posted March 14, 2015 Share Posted March 14, 2015 +-------Horn----------Ring ( switch ) + ^ Battery | - | -------------------------------| Quote Link to comment Share on other sites More sharing options...
DB8-TypeR Posted March 14, 2015 Share Posted March 14, 2015 Perhaps your car has a Horn relay, the horn will have a power supply controlled by the relay, horn switch has its own supply and switches the coil on the relay, hence why it has power when there is no horn in the circuit Quote Link to comment Share on other sites More sharing options...
downtrail Posted March 14, 2015 Share Posted March 14, 2015 Yes there should be a relay for the horn. Believe it or not horns actually draw a fair amount of current. the wire you speek of will show +12v through the coil of the relay this dosn't mean its a 12v supply but its at 12v potential due to you measuring 12v through the coil of the relay. earth it out and it will be at 0v potential and complete the circuit for the relay bringing the contacts in etc. Quote Link to comment Share on other sites More sharing options...
Frosty Posted March 14, 2015 Share Posted March 14, 2015 Have you used a pair of jumper cables to make sure the horn it's self is good? As mentioned above horns require quite a big amount of power to make them go, a 12 volt live wire does have 12 volt but my not have the amps to get the horn to go. An easy check is to put a head light bulb into that circuit, if it lights up all is well but if you get a week light you don't have enough power to get the horn going. Normal wiring for a horn in it's simplest form goes like this. + battery terminal to horn, other wire on the horn to the switch, switch to earth (- terminal battery). If your horn button is in the middle of the steering wheel, most are. Check the earth for the column it may be broken or not connected at all if it's been out in the recent past. Quote Link to comment Share on other sites More sharing options...
DB8-TypeR Posted March 14, 2015 Share Posted March 14, 2015 ^ I think his issue is that there is no horn but he has a live wire floating around inside the steering wheel that he cant find the source of rather than he has a horn that wont go Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted March 14, 2015 Author Share Posted March 14, 2015 Thanks all. Its a WB ute. To the best of my knowledge there are zero relays in the whole thing from the factory. The most advanced part is the indicator flash module lol. IRA too hard for me to explain Quote Link to comment Share on other sites More sharing options...
Mof Posted March 14, 2015 Share Posted March 14, 2015 Was it you that had this trouble about a week ago, and put earth in the steering column? or am I thinking about someone else Quote Link to comment Share on other sites More sharing options...
Raizer Posted March 14, 2015 Share Posted March 14, 2015 Was it you that had this trouble about a week ago, and put earth in the steering column? or am I thinking about someone else You're thinking of ShavenYak's Suzuki I believe. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted March 14, 2015 Author Share Posted March 14, 2015 The thing is..this wire should be open both ends. Its not connected to horn and there's no damn wheel there with contact ring. I did notice in photos last that there is a few non factory crimp connection there in loom that I didn't notice for some reason..I wonder if someone's just fucked up bigtime during some diy. Iv just cut the wire at base of column and made my own that isn't hot..it works now as it should ( earthing the contact pin behind wheel now closes horn relay)and isn't so confusing. That's for the help...but fucked if I know Edit. Well yes there's a horn relay! Iv added a new one up the front so my bypass has worked well. Little fucker was well hidden Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted March 14, 2015 Author Share Posted March 14, 2015 OK, title changed so I don't have to start another thread. I have just crimped up the battery cable from alternator. I now have to deal with the two pin socket and have found this easy diagram. I'm sure I have read that the num2 wire should go right back to the positive battery terminal. Is this correct or can it be wired as per the drawing, just looped down to the alternator batt stud? Additionally, the number 1 pin is charge indicator lamp AND is +12v while running and earthed when not, so the lamp is switched negative (sorry if not correct terminology). I wish to use an LED like my other indicator lamps. Will the diode effect of the led and low current draw be a problem? Again, I'm sure I have heard people having issues with this so want to get it right Quote Link to comment Share on other sites More sharing options...
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