I want to change the horn in my 2006 Rav4, to an American horn. What do I need for parts, if I need any other than the new horn I buy. And how is it wired ?
Not all horns require a relay unless the horn uses more power than the factory 10 amp horn relay can provide. Your horn (Hella Supertone) does require a relay (to the battery) because it uses over 10 amps. My Hella Sharptone only uses 7 amps so I don't require a relay.To get the most out of an upgraded horn you should use a relay, and provide power directly from the battery using the current horn wiring to "trip" the relay. I upgraded mine and the relay didn't arrive at the same time so I tried my HELLA 003399801 Supertone 12V High Tone/Low Tone Twin Horn Kit wired only using existing wiring and a better ground and it wasn't as loud as I would have expected. When I wired in the relay, it was an amazing improvement. There is no noticeable delay either.
Fixit , thanks for the good info and web sitesI removed the "meep meep" horns from my wife's 2010 RAV4 and replaced them with Freeway Blasters. These are made by Fiamm and are available on Amazon and ebay.
There is a high note (72102) and a ow note (72112)
I bought a set of Hella Supertones and sold them on craigslist. They had more of a gargly European sound than an authoritative sound. We install these Freeway Blasters at work. They don't need a relay and seem louder than the Hellas.
Access is limited on your RAV4 but they can be replaced without removing the bumper. Lots of patience and nimble fingers are needed.
The connectors are not a plug n play and will have to be altered slightly as with most aftermarket horns.
Or you could go to a salvage yard and pick up a set of Camry horns. Those will be ready to go and just as loud as the Freeway Blasters.
DL175, very good info of why a relay sometimes needs to be used.Not all horns require a relay unless the horn uses more power than the factory 10 amp horn relay can provide. Your horn (Hella Supertone) does require a relay (to the battery) because it uses over 10 amps. My Hella Sharptone only uses 7 amps so I don't require a relay.