I have a 2007 Harley Softail Custom and just installed the Harley Billet Headlight. I also installed the Super Spots Xenon 60/55 super white bulb to help improve the normally dim lighting on this bike. I rode in the dark last week and it was scary. I need better lighting so I went on line to different forums and found that several people were running the OSRAM H4 100/80W bulb and were pleased with the results. Many have used this bulb for years. There were,however, a couple of people that said their wiring harness burned up running this bulb. What are your thoughts on using a 100/80 watt bulb in place of the standard 60/55 watt? Do you think the additional wattage will harm my wiring?
Thanks – Ron
The problem is not with the wires that carry voltage to the bulb but with the ground wire. The safest way to run that wattage bulb is to run a 10 gauge wire for your ground all the way back to the battery negative side. Also make sure the connector going to the bulb is tight to the bulb connectors, that way heat does not build up due to resistance in the loose connection.