jdm headlight install
Some of those sites have you connect a relay to get the High beams to work on the H4's. You just need to connect the lights the same way as the USDM's. Low's to low, High's to high. Solder and heat shrink the connections.
i think the reason for the relays is the fact that the inner lights that would be the high beams on the usdm ludes are the 'fog' lights on the jdms that need to shut off while the highs are on. so you would use a relay for this. i could be mistaken though.
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