When it comes to wiring the Hella Horns on your awesome GrimmSpeed BroTie, we've got you sorted. After testing, we found that the extra few decibels from using a relay weren't worth the hassle and potential failure points of a more complex harness with an automotive relay, inline fuse, and direct battery wiring. Our fully pre - assembled simple harness allows for a quick plug - and - play setup in seconds. If you want that extra ear - piercing power, it can be adapted for a more complex relay harness. Diagrams for this configuration are in our installation guide below. Part #: 040005. Features include automotive grade 16ga wire for maximum volume with minimal resistance, heat shrink terminals for a reliable connection, protective wire sleeving for a clean look and protection against abrasion and stress, and a plug - n - play design with the OEM harness for easy installation and removal. Fitments are for 2002 - 2014 Subaru Impreza, WRX, and STI, 2002 - 2015 Subaru Legacy, 2002 - 2015 Subaru Outback, and 2002 - 2015 Subaru Forester.


Using this GrimmSpeed Hella Horn Wiring Harness is a breeze. First, locate the OEM harness in your Subaru vehicle (works for 2002 - 2014 Impreza, WRX, STI and 2002 - 2015 Legacy, Outback, Forester). Then, simply plug our pre - assembled harness into the OEM one, and it's ready to go. It's that easy and can be done in seconds. If you want to use it with a more complex relay harness, refer to the diagrams in the installation guide. When it comes to maintenance, regularly check the connections to make sure they're secure. Look at the heat shrink terminals and protective wire sleeving for any signs of wear or damage. If you notice anything wrong, it's best to replace the parts as needed. And that's all you need to know to keep your horn wiring harness in great shape.