Where is the (+) Horn Wire?

[TexasTruck]

I've searched "+air +horn +install" and I find tons of information for pre-2008. Either I'm missing it or the wire and tracer colors have changed in 2008. The closest information I found is the horn wire is underneath the fuse box on top of the drivers side front wheel well in the engine compartment.

Does anyone know where to tap the (+) horn wire?

Thanks!
Scott

[SPL2K]

The horn has constant 12v + so you have to use a - negative trigger. If you are wanting to trigger it with something that only has a + output, then you will need to use a relay to change the polarity.

the wire is yellow with a red tracer. You can get it at the switch in the column or in the smart junction box in the passenger kick panel. black 52 pin plug (B), pin 41