single wire horn

[echarleswhyte]

Does anyone know why the Corolla's horn, in my case 2013, only has one wire?

 

[fishycomics]

as it grounds to a chassis, or frame doesn't need two wires.

 

[echarleswhyte]

ok, so I figured something like that. So when I get an after market horn all I have to do it connect the wire to the positive terminal of the horn and there are no problems, correct?

 

[fishycomics]

And the other to the chassis. simply find a spot on the frame under a bolt and good to go.

 

[Slowrollin999]

Wire that you see is positive line, ground is built into horn and grounded using the bolt on top, most aftermarket horns have no specific polarity so there is no specific positive and negative insert it's just plug n play, as long as the horn has a positive and negative somewhere it will work (that got me on hella horns, thought there would be + and - labeled)