STEDI SMART HARNESS SERIES
SMARTER WIRING. SIMPLER INSTALLATION.
A dual-relay, dual-connector plug-and-play wiring solution for high-beam-triggered STEDI driving lights. Intelligent polarity detection, included HB3/H4 adaptors and a waterproof isolator switch simplify the installation of compatible auxiliary lighting.
Switching relays
Output connectors
Heavy-duty cabling
Adaptors included
What Makes the SMART Harness Different?
A conventional wiring harness can require additional diagnosis on modern vehicles with complex high-beam switching. The STEDI SMART Harness uses a built-in microprocessor to detect positive and negative switching automatically, helping avoid unnecessary wiring modifications on supported installations.
Technical Specifications
| STEDI part number | WIRQKFT-D-RELAY |
|---|---|
| Output connections | 2 × DTP connectors |
| Switching relays | 2 × 12 V / 60 A |
| Fuse protection | 2 × 12 V / 35 A |
| Maximum load | 35 A at 12 V, per STEDI |
| Harness cable | 10 AWG |
| High-beam input | Included HB3 and H4 piggyback adaptors |
| Switch | Waterproof on/off isolation switch |
| High-beam switching | Automatic positive / negative polarity detection |
| Warranty | 12 months |
What's Included
- One STEDI Dual Relay / Dual DTP SMART Harness
- HB3 and H4 high-beam piggyback adaptors
- Waterproof isolator switch
- Instruction leaflet
Lighting fixtures and vehicle-specific adaptors other than HB3/H4 are not included. Confirm connector type and electrical load for your installation.
CAP-IT INSTALLATION
Connect Your Driving Lights Properly.
Ask a participating Cap-it location about selecting the correct harness, checking your vehicle's high-beam connector and professionally mounting and wiring STEDI auxiliary lighting.
Frequently Asked Questions
+Will this harness work with negatively switched headlights?
STEDI specifies a built-in microprocessor that detects positive- or negative-switched high-beam circuits. Confirm adaptor and vehicle-specific compatibility before fitting.
+Which high-beam connectors are included?
HB3 and H4 piggyback adaptors are included. Other bulb types and vehicle-specific adaptors may be available separately.
+Will the driving lights turn on with low beam?
The harness is designed to trigger auxiliary driving lights from the factory high beam. Its included switch functions as an isolator.
+How many light outputs are there?
There are two DTP output connections and two relays, making this the dual-relay harness rather than the single-relay SMART Harness.
+Does it include instructions?
Yes. STEDI lists an instruction leaflet as supplied.
THE CAP-IT TAKE
THE RIGHT HARNESS FOR TWO OUTPUTS.
For dual driving-light installations where high-beam triggering and modern vehicle compatibility matter, this purpose-built STEDI harness offers a cleaner starting point than assembling a custom wiring setup.