Product Description
H4 Headlight Relay Wiring Upgrade Kit – Waterproof
This relay wiring harness upgrades the stock headlight wiring by supplying power directly from the battery to the headlights. This reduces voltage drop in the factory wiring and allows modern H4 bulbs to operate at full performance.
The original headlight wiring is only used to trigger the relays, while the main current is routed through the included harness and the two 30-amp relays. This significantly reduces load on the headlight switch, dimmer switch and factory wiring, improving overall headlight system reliability.
The kit installs quickly without cutting or modifying the original wiring. Simply connect the harness to the factory headlight sockets, attach the power lead to the battery and connect the ground wires to the vehicle body.
Features
Relay wiring upgrade kit for H4 headlights
for vehicles with 4-headlamp systems
reduces voltage drop in factory wiring
improves headlight brightness and reliability
two 30 amp relays included
pre-wired harness for easy installation
waterproof relays
no cutting or splicing required
Includes wiring harness, relays and mounting hardware.
