Re: Dome, Cargo, and Courtesy Light Mystery
That fuse tap should be a good 12 volts or better. Does it change if you start the engine?
Also, there should be an orange wire that carries 12 volts to each bulb (cargo, dome, etc). It does not ground thru the fixture itself. It grounds when the door pin switch (white wire) or cargo switch (the reostat in the light switch) is grounded, thus completing the circuit. In my case, that's why the chrome plateing was messing mine up.
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