94 honda civic keeps blowing taillight/parking light fuse. Replaced switch didn't help. Unplugged all parking lights, turned on parking lights and the fuse blows. I believe it is a short but can't find it with a multimeter. Is there anything else to check?

Using a test light (tool of choice), check each connector and switch for a possible short. Examine the wiring for a possible insulation break, resulting in a direct short.