"Harness quality is well made. Hooks up well. Only problem that would be nice is to mark which connector is (+) and which is (-) when hooking up to the horns."
Simple Problem. Simple Solution.
When it comes to wiring the Hella Horns mounted to your beautiful GrimmSpeed BroTie Bracket, we have you covered. Don’t stress yourself with trying to make a Hella horn harness from scratch when we offer a simple pre-assembled, OEM-quality harness that will allow you to plug and play in seconds. Our latest version of this harness has a custom-molded connector for an exact fit and is made longer to accommodate fitments for all 15+WRX/STI.
You’ll notice our harness does not incorporate the Hella-provided relay as standard. After some testing, we determined that the additional few dBs offered by wiring with a relay weren't worth the added headache and potential failure points of a more complex harness using the relay, inline fuse and additional wiring directly to your battery. Should your heart desire those last few ounces of dBs, our harness can be adapted for use with a more complex relay harness.
QUICK SPECS:
- Automotive Grade 16ga Wire - Minimal resistance for maximum volume
- Heat Shrink Terminals - Heat shrink, crimp-on terminals ensure a reliable connection
- Protective Wire Sleeving - Clean black look, protects against abrasion and stress
- Plug-n-Play with OEM Harness - Installs and uninstalls in seconds with our custom connector
FITMENT:
- 2015-21 Subaru WRX*
- 2015-21 Subaru STI
- 2013-21 Subaru BRZ
- 2013-16 Scion FRS
- 2017-21 Toyota GT86
*-USDM vehicles only.
INSTALLATION:
GrimmSpeed BroTie Installation and Wiring GuideOverall rating: 4.5 / 5 from 10 reviews.
AI Generated Review Summary
Summary topics
Review topics: ["quality","install","plug","harness"].
Review highlights
Reviews
Connector wasn't correct for OEM
"2021 WRX - the OEM horn connector is single-terminal, not two-terminal, so the connector was not usable. Additionally, instructions state that looking at the wires through the sheathing, two are blue and two are red, so polarity can be determined - all four of the wires in mine were red. (Also, next step in the instructions says black and red. . . is it blue or is it black? I'd expect black for ground 🤷)"
Easy Installation
"This install was a simple plug and play. Much easier then wiring up the horns with using the relays provided. The only issue I had was that the cables weren't labeled on which was positive and negative. After a little guess and check the horns worked as expected. Would highly recommend this cable if you choose to install the hella horns."
Plug and play
"The wiring harness is plug and play and the connector snaps securely in place. My only suggestion is to mark the cables with red on the 2 positive connections to take the guesswork out of installation. I installed it and there was no sound from the horns. Swapped some wires and only one horn was working. Finally after the third try both work as they should. Is piece of red tape or a red paint pen would be an easy fix. Or use red heat shrink. Thanks for the great harness! Nice quality and worth the money."
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Direct plug and play. The GS harness plugs right into the existing right front horn, behind the fog light. Quick and easy install.
"Direct plug and play. The GS harness plugs right into the existing right front horn plug, behind the right fog light. Disconnect the old horn plug and connect the GS harness into it and beep away my friend. That easy."
2020 WRX
"Super easy, only difference from the GrimmSpeed install video is on my 2020 the harness was on the passenger side horn just in front of the wheel well, and the other end was the horn toward the center driver side. Still super easy and perfect length to connect and hide the wires."
Super Quality
"There’s no way you’re going to do a good a job as Grimmspeed did making this harness. It’s a beautifully made harness and it’s truly plug and play. Make your life easy and keep your ride clean."
Hella horn harness
"Worked exactly as described. Perfect plug and play for the Hellas. Super fast shipping. Will definitely be doing some more business with Grimm Speed in the future."
Easy to Install and In Stock!
"Everywhere else seems to have their harnesses on a 2-3 week back order. Grimmspeed got it to me in a few days so I can actually use the horns that I paid for!"