Bolt-In Brilliance
4: If you're using any of the high-performance IPF H4 bulbs you'll need to install the High Performance Wiring Loom. This system bypasses the stock headlight wiring and draws power directly from the battery. The only association the new loom has with the factory harness is to receive instruction from it as to when to activate the headlamps. The first step is to find a suitable mounting location for the relay blocks and fuses. We mounted ours on the firewall.
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