Originally Posted By: madRiver
Drive defensively and horn won't matter.
This is wrong. Absolutely, positively wrong.
When an [censored] Excursion driver is playing hammer and anvil with your subcompact and a Semi, the Excursion driver sees you and doesn't care but maybe you can make yourself heard to the Semi driver, who is a Pro that doesn't want an accident on his record.
Originally Posted By: gofastman
I'm telling ya, look at your wiring! Horns draw a lot of power, even the "meep meep" ones pull like 50w if it's available. Power like that requires at LEAST 16ga wire.
Yes, but there's more than that. Startup peak draw exceeds steady-state draw, just like an electric motor. I put a pair of PIAA dual tones on my Corolla, together they drew well under 10A, but after a few months started blowing fuses. I put in a relay and a diode and a separate 16 ga battery circuit with 20A fuse, problem gone. The original circuit just powers the relay.
The Diode is important to keep the coil in the relay from back-feeding your electrical system. Put it in parallel to the relay coil side, so that it does not flow current in normal 12V orientation. Any power supply rectification diode will do fine.
Originally Posted By: Nick1994
Maybe the TDIs have different horns? Also my car is the loaded GLS model, maybe it has premium horns lol
A quick check of eBay used Beetle horns and it seems that indeed, Hella's were used as an OEM horn. Interesting!