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Gen 7 H4 Bulb install

 
Remove the rubber boot and undo the retaining spring, then remove the old bulb
Unscrew the heatsink from the LED bulb

 

Insert the LED bulb into the housing as per the old bulb and secure the retaining spring

Feed the wire through the rubber boot and secure the rubber boot
Screw the heatsink back onto the bulb. Screw on till snug... do not over tighten
Plug the LED into the control box and plug the controller into the OEM light socket
Now your instal is complete.
This for an H4 fitment but the H7 is the same principle