geoz3 Posted July 24, 2023 Posted July 24, 2023 Installed new Harely rear taillights in my project, brake light and turn signals work, turn on the park or headlights 20 amp fuse blows. Is the proper way to measure load in Watts, or AMPS? The bulbs show both wats and amps, glass fuses show watts and amps.
MV8 Posted July 24, 2023 Posted July 24, 2023 Yes to both. Did it work before? Probably would blow with the bulbs removed but that is not a good way to test it. Pictures?
geoz3 Posted July 24, 2023 Author Posted July 24, 2023 It did work with the original lights, don't know what pictures to post?
geoz3 Posted July 24, 2023 Author Posted July 24, 2023 The new bulbs are much higher wattage, according to item description of both bulbs. I guess I'll install the old lights and see if that is the problem. I don't want to increase the fuse size and take a chance of cooking the wire.
MV8 Posted July 24, 2023 Posted July 24, 2023 Pictures of what was removed, what was installed (many different lights for Harleys), picture or info on the light switch gear (many different types of those). It could be that the wiring is marginal for the old lights so no upgrades, or the change you made was wired incorrectly. You've not really told me anything. Do not put a higher amp fuse in the circuit. You should map out the circuit to know what you have. 1
jbcollier Posted July 25, 2023 Posted July 25, 2023 You’ve just changed the rear light units. I would suspect the tail/park wire is grounded.
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