How to Tap Into A Headlight Circuit - Branch Circuits | Ep: 8/10
11 mai 2025 · 10 min · 15K vues
Ce que couvre cette vidéo
To trigger auxiliary off-road lights simultaneously with factory headlights, install a relay to isolate the high-wattage lighting load from the vehicle's existing headlight circuit.2:57 Tapping directly into the headlight wire to power high-draw lights risks overloading the factory circuit; instead, use the headlight's positive wire only as a low-amperage signal source to activate the relay.3:40 Connect the signal wire to the relay using a Posi-Tap connector, which pierces the insulation to create a weather-tight electrical contact.5:39 The relay then draws primary power for the auxiliary lights directly from an auxiliary fuse block, such as a Blue Sea Blade Fuse Block, rather than the headlight circuit.3:40 While the Posi-Tap method slightly damages the factory wire insulation, it provides a reliable, common practice for signal-level connections.9:00 Ensure the Posi-Tap size matches the gauge of the factory headlight wire to maintain a secure connection.7:57
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