Dome lights don't come on & trunk light will not come on either in my 2010 ford fusion.#25 fuse is for these lights, but it is blown, and when I replace it, it blows again.
Good morning Cletis
When the fuse blows again, is it as soon as you turn on the power to the car in general, or when you do something like open the trunk or a door that will turn one of those lights on? Might be harder to tell since those lights often come on even with the car turned off, though you can probably turn them off with local switches.
At any rate, if it only happens when the car is turned on, then it's likely something on the ground side of things. If it's only when the lights turn on, then there is likely a short in the electrical loop(s) for the lights that is dropping to ground when the circuit is completed. If the lights are good, to they come on at all, even for a moment, before the fuse blows? If so, are they normal brightness, or dim? If they are dim or not on at all, it's probably a short. Best bet then is to work backwards from the light fixtures. Sometimes insulation can degrade, or get nicked by something during service or maintenance, leading to the short. If it's not close to the lights, it may get trickier since the wires inevitably are funneled through the car frame, requiring panels to be removed to get at all of it. If you have access to a voltmeter, you can also check whether the hot lead to the socket is connecting to ground (do this with the car off, bulb out, switch turned off for the light. It should be open circuit with the switch off. if you connect to ground anyhow, then the hot lead side is shorted somewhere.
Hoping this helps, and good luck!
