fordgru

So was planning my next mod to make my factory horn louder and started thinking if there's away to connect a siren to the trucks alarm system?

ALSO does anyone know what this second connector is above the horn?

Mike FX4

I think that is the ambient air temp sensor.

fishbones182

That is correct.

fordgru

So is it possible to upgrade the horn for security alarm purposes?

Like adding an siren

Mike FX4

Don't know. My truck has an aftermarket alarm with its own siren. I have it programmed to use the siren along with the factory horn for extra noise.

If you just want a louder horn, get a semi or train horn.