jumpers
Well not to argue with Dave but jumpers are a very usefull method of troubleshooting. If the jumper wire is of equal or larger wire gauge then there should not be a problem. In this case we already know from the original post that the horns work. I would still do one test which is to jumper from a 12v source (either the spade on the relay or the battery to the wire on the relay that goes to the horns. This in essence eliminates the relay. If they do not work with 12v on that wire we know at least one issue is in that portion of the circuit. The other thing to do is put a multi meter on the spade for the horns and see if you get 12v on it when the relay picks. The other would be to rig a temporary wire from the horn spade to the horn and see if they work. I fully believe in bench testing and have my own regulated DC power supply on my bench but I also believe in fault isolation. I bow to Dave on the information he provides and no way question his technique.
Well not to argue with Dave but jumpers are a very usefull method of troubleshooting. If the jumper wire is of equal or larger wire gauge then there should not be a problem. In this case we already know from the original post that the horns work. I would still do one test which is to jumper from a 12v source (either the spade on the relay or the battery to the wire on the relay that goes to the horns. This in essence eliminates the relay. If they do not work with 12v on that wire we know at least one issue is in that portion of the circuit. The other thing to do is put a multi meter on the spade for the horns and see if you get 12v on it when the relay picks. The other would be to rig a temporary wire from the horn spade to the horn and see if they work. I fully believe in bench testing and have my own regulated DC power supply on my bench but I also believe in fault isolation. I bow to Dave on the information he provides and no way question his technique.
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