Re: trailer running lights
gonefishie - You're exactly right about the light mounting stud and the trailer being the same thing and there being zero ohms between them, IF the light stud is making good contact to the frame. That's the point that everyone has been trying to make to you.<br /><br />Without a good connection between the light stud and the trailer frame, you'll have a poor ground which can cause the symptoms you've reported. As an ET you'll understand that if the return path (ground connection) for your right blinker light is high resistance the current will take the path of least resistance such as through your other lights (your other lights flashing dimly are symptoms of that). If you want to, you could probably trace then draw out a schematic of your truck and trailer's circuitry showing all the parallel paths to ground through the different bulbs. Then you could take into account the filament resistances and applied voltages under different conditions to theorize where the fault lay.<br /><br />But it's simpler to just go make sure the ground connections are in fact good. A previously good connection can turn bad because of corrosion, or get loose because of vibration. Many have mistakenly assumed the ground connection to be good because it looked good, only to find out it wasn't good, hence the suggestion that you measure to determine for sure.<br /><br />If you want to rewire the trailer, that should be simple for an ET, but if the ground connection between the light stud and the trailer is not good, rewiring the trailer won't make any difference. Good luck.
