Take the guesswork out of wiring your driving lights with the STEDI Dual Output Quick Fit SMART Harness™. This all-in-one Plug & Play wiring loom has been designed to simplify installation while providing high-current performance and compatibility with both positive- and negative-switched high beam systems.
Featuring 10AWG high-current cable, a built-in microprocessor, waterproof switch and DTP-to-DT reducers, the SMART Harness™ provides a comprehensive wiring solution for your driving lights.
Plug & Play High Beam Activation
The supplied HB3 and H4 adapters allow your driving lights to be triggered directly from the vehicle's high beam without cutting, splicing or soldering the factory wiring.
Installation is simple:
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Unplug the HB3 or H4 connector from the back of your headlight bulb.
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Plug in the appropriate STEDI adapter.
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Connect the SMART Harness™.
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You're ready to go.
Your driving lights will only activate when the high beam is switched on, while the included ON/OFF switch functions as an isolator.
SMART Positive & Negative Switch Detection
The SMART Harness™ features a built-in microprocessor that automatically detects whether your vehicle uses a positive- or negative-switched high beam system.
No modifications or manual configuration are required. Simply connect the harness and let the SMART Harness™ handle the switching configuration automatically.
This makes it particularly useful for popular 4x4s where connecting aftermarket driving lights to the high beam can otherwise be complicated, including vehicles from Toyota, Ford and Mazda.
High-Current Dual Output Design
The SMART Harness™ uses 10AWG high-current cable and a 60A switching relay, providing a robust wiring solution for high-powered driving lights.
The harness also includes DTP-to-DT reducers, allowing compatibility between these two common connector types.
Complete Wiring Kit
Everything you need to connect your driving lights is included:
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Dual-output Quick Fit SMART Harness™
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HB3 adapter
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H4 adapter
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60A switching relay
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35A fuse and fuse kit
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Waterproof push-button ON/OFF switch
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DTP-to-DT reducers
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Ribbed cable protection
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Heat-shrink-wrapped relay
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UV-rated insulation
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Installation instructions
Cable Length
The harness provides generous cable length for flexible installation:
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2.4m – Relay to switch
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2.0m – Driving light connector to relay
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2.0m – HB3/H4 adapter to relay
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6.4m total cable length
Specifications
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12V DC system
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10AWG high-current cable
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35A rated fuse kit
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60A switching relay
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Positive and negative switch compatible
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Built-in microprocessor for automatic switching detection
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Waterproof ON/OFF switch
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DTP-to-DT reducers included
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UV-rated insulation
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Plug & Play installation
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No cutting or soldering required
Vehicle Compatibility
HB3 and H4 are among the most common headlight connectors found across popular vehicle makes and models.
If your vehicle does not use an HB3 or H4 connector, the harness can still be used to trigger your driving lights from the high beam with the appropriate adapter.
Additional adapters are available separately for:
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H1
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H7
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H9
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Volkswagen Amarok
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Toyota 200 Series LandCruiser
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Mitsubishi MQ & MR Triton
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Isuzu MU-X / D-Max
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Ford Ranger / Raptor PX2 & PX3
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Holden Colorado
Please check your vehicle's headlight connector and wiring configuration before purchasing to ensure compatibility.