Official manufacturer imageOur picks
Top picks
Official manufacturer image
Official manufacturer imageNITECORE NU25 MCT UL
Check price on Amazon AU
Official manufacturer imageBlack Diamond Spot 400 Headlamp
Check price on Amazon AUMore topics
Common questions
Questions before you buy
What does a headlamp relay do?
It switches electrical power to a vehicle lighting circuit under control of the vehicle’s electrical system. The exact circuit and relay location vary by vehicle.
Is a headlamp washer relay the same as a headlight relay?
Not necessarily. A washer relay, when fitted, relates to the washer system, while a headlamp relay controls a lighting circuit. Check the vehicle wiring diagram and fuse-box legend.
How do I know which headlight relay fits my car?
Use the vehicle make, model, year, trim and the original relay part number or wiring diagram. Do not choose solely by appearance because pinout and electrical ratings can differ.
Can I replace a headlamp relay myself?
Only if you can identify the correct component and follow the service information safely. If the fault persists or wiring is damaged, have the circuit checked by a qualified technician.









Headlamp Relay Wiring Diagram