STEDI Dual Connector Plug & Play Smart Harness High Beam Driving Light Wiring

$121.00 Inc Gst

Available on back-order



While others claim to be ‘universally compatible’ with both positive and negative switched vehicles, it doesn’t take long to see that this is not the case. The STEDI™ SMART Harness™ is unique, in that it has a built-in microprocessor that deals with even the most complex vehicle wiring systems. Our aim was to create a stress-free installation process, with peace of mind of knowing it will all come together in the end.


Whether your driving lights use the popular DT or DTP connectors, our SMART Harness™ caters to both by providing a cross-compatibility platform that will lay any confusion to rest. Dual output allows for running anything from a single to dual slim LED Lightbar to a set of high-performance LED Spotlights like our STEDI Type-X.


100% Plug & Play, no splicing or grafting required, our SMART Harness™ will install straight to your vehicle hassle-free triggering straight from your vehicle’s high beam. With an all-new waterproof switch for open cabin application, included HB3 + H4 Piggy Back adaptors fitting most vehicles’ factory headlights with H1, H7 & H9 also available; this is your all-in-one wiring solution.


Dual Output Quick Fit SMART Harness™ | Our all-in-one wiring loom

Our all-new Plug & Play SMART Harness™ for Quick Fit installation of your driving lights. Incredible High Current 10AWG cable, negative switch compatible, waterproof switch & DTP to DT Reducers bridging the compatibility between the two connector types. Our SMART Harness™ has been designed around the consumer to simplify the installation process.

The supplied HB3 and H4 Adapters trigger your driving lights from your high beam without cutting or soldering any wiring. Simply unplug your HB3 or H4 connector at the back of your headlight’s bulb, plug in our adapter, and you’re done! Driving lights will only trigger from a high beam, and the switch will act solely as an isolator.

Our new SMART Harness™ has a built-in microprocessor that automatically detects whether your system is positive or negative switched, and will work right out of the box without any modification whatsoever. Toyota’s, Ford Ranger, and Mazda BT50 among many other popular 4x4s are notorious for being very difficult and costly to wire driving lights to high beam, our quick-fit harness takes all the guesswork out of it.

It contains everything you need to get your lights connected: ON/OFF Switch, 60A Relay, 35A Fuse, ribbed cable protectors, heat shrink-wrapped relay, DTP to DT Reducers.

  • Featuring a total of 4.8 meters of wiring (fully extended)
  • 2.4m of cabling from Relay to Switch
  • 2.0m of cabling from the Driving Light connector to the Relay
  • 2.0m from H4 or HB3 Adapter to Relay
  • Total cable length 6.4m
  • 12vDC 35A Rated Fuse Kit
  • 12vDC 60A Switching Relay
  • Push Button ON/OFF Switch
  • UV Rated Insulation
  • Instruction included.

HB3 & H4 are the most common wiring connectors found in most popular makes and models. If your car does not use H4 or HB3, this wiring harness can still be used to connect to a high beam. We also sell separately H1, H9 & H7, as well as vehicle-specific adaptors for the Amarok, 200 series Landcruiser, MQ & MR Triton, Isuzu M-UX / D-Max, Ranger / Raptor PX2 & PX3 7 Holden Colorado.


MAX LOAD 35A @12v



  • 1 x STEDI SMART Harness™
  • Dual Output with DTP connector
  • DTP to DT Reducers
  • HB3 + H4 Piggy Back Adaptors
  • Waterproof Switch
  • Instruction Leaflet




STEDI was founded in 2013 out of the small 290m2 warehouse in Melbourne, Australia, by founders Eddie & Sandra Yilmaz. Back then, the world of the LED driving light was largely novel. The first-ever round variant of LED driving light had only just hit the market in 2013. Like us, even the manufacturers around at that time were new to LED. We’re talking about a period when LED bars could barely throw out to 50m, and the lenses were made from glass. On the one hand, it was a great time to enter the market because it wasn’t overly crowded - even the well-known brands had no LED offering. On the other hand, there was a severe lack of manufacturing and design know-how, and the subsequent product quality was way off the mark. Everything that could go wrong went wrong. LED failures, water ingress, housing turning bronze from UV – which all happened more often than it didn’t. We moved from manufacturer to manufacturer, hoping to find one that had stable quality. After wasting a lot of time and money, we assumed that all manufacturers were just as bad as the other, and the only way forward was to work closely with one to co-develop. While we were busy losing money and grappling with the quality issues, the market was getting more & more crowded by the second. We were barely making $10 on a 22” light bar. This was an interesting point in time, as we watched many competitors exit the market. The ones who stayed were looking at ways to cut corners to reduce manufacturing costs. We pivoted in the opposite direction and started looking at ways to improve quality and performance – and that’s when our story really starts.