iJDMTOY 12V Horn Wiring Harness Relay Kit Compatible with Car Truck Grille Mount Blast Tone Horns (Actual Horn Not Included)

My intention was to install this on a 2018 Civic with Hella Supertones, since the friendly "meep meep" stock horn was somewhat embarrassing. I was initially apprehensive of the cable lengths, but after installing the horns and harness, it turns out my concerns were unfounded.There are two potential points of improvement here. First, the end that connects to the vehicle's wiring has what look like female banana clip connectors. I've never seen those outside of home stereo applications, so I cut them right off and soldered it into the system using the College Hills horn adapter.The second thing, as the headline suggests, is the relay. Something is definitely wrong with the relay that comes with this harness: honking the horn with the in-box relay results in one Supertone horn beeping slightly but noticeably before the other, and the beep doesn't sound as strong as I'd expect. Replacing it with its Bosch equivalent fixes that right up.So, if you're buying this harness, save yourself the trouble and buy the Bosch relay with it (or just use the one that comes with your Hella horns, if you got that option), and get rid of the one that comes in this product's box.Both of these are somewhat minor inconveniences so only one star comes off. Other than those things, this harness looks and feels very well put-together, and does exactly what it says.

I bought this on a recommendation on a bike forum and it allowed me to upgrade from the pathetic stock horn, to 2 larger and *louder* horns. It's a helluva upgrade for a bike, with everyone trying to kill you when you ride.My only quibble is that the terminals on this harness to connect to the to the existing *spade* connectors for the stock horn wiring, are M/F bullet connectors. I don't get that, at all, esp. since spade connectors are used to connect the harness to the new horns. Why aren't there spade connectors all around?So, those had to be snipped off and I bought spade connectors to crimp on in their place. It's a puzzling design decision, but the simple mod works. It was just another trip to the auto parts store. (sigh...grumble)

The wiring harness works as intended. However, the relay that came with it is inadequate. Replacing the relay with a Bosch relay (https://www.amazon.com/Bosch-Automotive-0332019103-Normal-Relays/dp/B004Z0VX4S) makes it work perfectly.

The harness went together super easy took maybe 5 min to set it up but my issue came the following day when I was cut off in traffic and the horns would not work because the relay got wet from the rain the night before now I have to go out and buy a new relay for like 10 dollars which isn't much but overall it's made well as far as the wires go but you might as well just pre plan if you buy this buy a good relay from a parts store that comes with a minimum 30 day warranty

2016 WRX STI here, I installed these harness with no problems at all. I have small basic knowledge about electrical, but any how yes YOU DO have to modify your connectors in order to get it properly WORKING. I bought some electrical pins, connected it onto OEM connector just follow the basic RED/BLACK color and you are GOOD. even a 5 year old can do it. The only main concern I have here is that the wire is TOO SHORT connecting onto the OEM connector so I had to solder and lengthen the wire a bit, put some heat shrink, electrical tape and you are SOLID. The only plug and play on that part is the Harnees connecting onto your Hella horn. Definitely needs patience/ thinking when splicing/connecting wires. OVER ALL this Harness is GREAT I got no concerns. Definitely would recommend this Item.