Quote:
Originally Posted by FrugalFannie
So none of our marker lights are working. According to info on the 'webz, DOT requires these to work. There is power going to every marker light and the wire is good. Where is the negative/Common? Haven't pulled the lights off the bus but the inside is gutted so I have access to the 1 power line that runs to all of these.
Ideas?
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They ground through the socket into the mounting screws. Don't need a ground wire when the entire bus body is metal.
Check the sockets for corrosion. Half of mine weren't working and new bulbs weren't fixing it, but I had power. Removed one and looked inside the socket and it was a rusty mess. It's probably also worth making sure the actual contact between the screws and the body isn't rusty either.
This happens because most halogen light assemblies are poorly sealed at best, especially after 15 years or so.
I replaced mine with LEDs (fortunately I found a direct fit replacement) and haven't looked back.