So, the more I read the more I realize I might need some additional components to install my new horn kit. It looks like a harness and mounting bracket are essential. Can anyone verify that and tell me where I can purchase these items? I have a 2021 Forester Premium with and automatic transmission
DanPurcell
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No. Car is in Maine and I’m in Virginia. Trying to gather what I can before I go there.
Suddenly all the commentary about adequate wiring is germane to the discussion...
So I installed my Hella hors at the original locations with NO horn relay. I use for over 2 years with no problems. I did remove the front bumper cover to make it easier.
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I saw you post on another unrelated topic about installing hella horns. I purchased the set and I'm planning to do the same on my 2022 forester. Can it wire directly to the (2) factory horns? I don't care if they're mounted out of site I just want the better sound. Thanks!
@Tmntjmc
Read the previous thread posts that have everything you need to know.
To summarize - Yes, you can use the existing wiring, but that isn't ideal, as the replacement horns use more power than the factory beeps, so you won't get the output from the horns you would with adequate power.
Ideally, you should use a relay and use the factory horn power to switch the relay, and run a power line to the relay and to the horns. This is already in the thread previously, along with wiring diagrams if you want to do it right.
If you want to use the existing horn wiring, the horns will work, but not as well.
Less sound output.
Your choice.
Read the previous thread posts that have everything you need to know.
To summarize - Yes, you can use the existing wiring, but that isn't ideal, as the replacement horns use more power than the factory beeps, so you won't get the output from the horns you would with adequate power.
Ideally, you should use a relay and use the factory horn power to switch the relay, and run a power line to the relay and to the horns. This is already in the thread previously, along with wiring diagrams if you want to do it right.
If you want to use the existing horn wiring, the horns will work, but not as well.
Less sound output.
Your choice.
This thread has been really helpful -- thanks to all. I went with these:
and
Couldn't be happier. Current draw is low, so no need for a new relay/switch; existing wiring is fine and the aftermarket harness fits perfectly. Sound is great. Far louder than stock and a very pleasing harmony from the two notes. By far the hardest aspect is accessing the mounting points. But like almost every job in a Subaru if you remove the entire airbox assembly it's not too bad. I also removed the plastic sheath that sits sort of above and between the grille and the radiator. It's fiddly to remove as it has to be manipulated a million ways before it will finally escape, but once those items were out of the way, the old horns and the wires were reasonably accessible. I did take a few photos and would be happy to post them and my basic process if anyone is interested.
Amazon.com: SYOAUTO Car Horn 12V Loud Universal Fit High Low Tone Waterproof Truck Horn Replacement Kit : Automotive
Buy SYOAUTO Car Horn 12V Loud Universal Fit High Low Tone Waterproof Truck Horn Replacement Kit: Air Horns - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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and
Amazon.com: SEINECA 2pcs Car Horn Special Plug Compatible with Toyota Horn Adapter Wiring Harness Cable Car Horn Converter Wiring. : Automotive
Buy SEINECA 2pcs Car Horn Special Plug Compatible with Toyota Horn Adapter Wiring Harness Cable Car Horn Converter Wiring.: Wiring Harnesses - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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Couldn't be happier. Current draw is low, so no need for a new relay/switch; existing wiring is fine and the aftermarket harness fits perfectly. Sound is great. Far louder than stock and a very pleasing harmony from the two notes. By far the hardest aspect is accessing the mounting points. But like almost every job in a Subaru if you remove the entire airbox assembly it's not too bad. I also removed the plastic sheath that sits sort of above and between the grille and the radiator. It's fiddly to remove as it has to be manipulated a million ways before it will finally escape, but once those items were out of the way, the old horns and the wires were reasonably accessible. I did take a few photos and would be happy to post them and my basic process if anyone is interested.
Thanks for this. One question.... How do I find the horn "trigger" wire? Is it not wired into the fuse panel where the OEM relay is located? How do I get to it ?
Keep in mind that there are good, loud, options that don't require a relay. See my post (#47) above for an example. The only complication (if you can even call it that) of my installation was that it requires adding a ground wire from one of the horn leads to the mounting bolt. Super easy to do, but the ground wire isn't there on the OE horn because it's already incorporated into the mounting bolt. Other than that it's a totally clean swap and the result is great. I'm sure there are louder options but it seems to me these are plenty loud without spilling over into the "obnoxious" realm . . .
@deeveebee agree.
As long as you remove both old horns and do a 1 for 1 swap, you are probably going to be fine. What gets people into trouble is when they try to add two horns up front off the single horn wire. Now they are powering a total of 3 and expecting the one wire up front to power two new horns. Unfortunately, people do the darndest things.
As long as you remove both old horns and do a 1 for 1 swap, you are probably going to be fine. What gets people into trouble is when they try to add two horns up front off the single horn wire. Now they are powering a total of 3 and expecting the one wire up front to power two new horns. Unfortunately, people do the darndest things.
That's what I ended up doing... All good! Thanks!
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