Sorting out a non-functioning horn on your Holden HQ, HJ, HX, HZ and LH, LX, UC Torana model, often comes down to one common issue — the original 3-pin relay. With these relays no longer in production, the Horn Relay Conversion Repair Kit provides a practical and reliable upgrade. Designed as a specialised plug-and-play solution, this kit converts your factory 3-pin horn relay to a modern 4-pin relay, restoring dependable horn operation without compromising factory wiring integrity.3-Pin To 4-Pin Relay Conversion: Upgrades the obsolete factory 3-pin relay system to a modern and more readily available 4-pin configuration.Ideal Repair For Non-Functioning Horn Systems: The standard and practical fix where original relays have failed and replacements are unavailable.Plug-And-Play Installation: Direct connection to factory wiring with no cutting, splicing or soldering required.Model-Specific Relay Positioning: HQ & HJ is typically mounted on the radiator support panel, while HX & HZ is commonly located near the washer bottle area.Clean, Reversible Upgrade: Maintains original wiring integrity, making it suitable for restorations and well-presented drivers alike.For classic Holden owners wanting a straightforward and dependable fix, the Horn Relay Conversion Repair Kit takes the hassle out of sourcing obsolete components — delivering modern reliability while keeping installation simple and tidy.