Since it is LED, the dimmer switch will need to be in the brightest light position for the LED to work correctly. Depending on the manufacturer, some LED replacement lights will have a circuit that will work with a dimmer switch but most do not. If the dimmer switch is not on, "Full Bright" setting, the LED will either blink or not work at all.
The diagram for fuse boxes is very confusing. They are oriented as if you have the cover on and are looking from the point of view from the fuses out. It is very hard to even orient the diagram. I still have to think it out. The best way to do this is to orient the fuse puller and spare fuses on the diagram and then look for the same amperage fuses on the diagram. 10 amp fuses are red, 15 amp fuses are blue and 20 amp fuses are yellow.
As far as which fuse is for the dome light, there should be a fuse labeled, "interior" or "courtesy" lights. It might not even be that clear as to which fuse is for the dome light. More than likely, it will be a 10 or 15 amp fuse. So, if you can't figure out the fuse from the diagram, you are going to have to pull and inspect fuses for the blown fuse.
There should be a fuse puller on the fuse box that looks like a pair of tweezers. You might note that most fuse box diagrams have the puller on the diagram and you can use that to orient the diagram with the fuses.
A fuse, when pulled out, will have an, "Element View" where you can see if the fuse element has been burnt and is no longer a continuous piece. Hold the fuse up to a light and look in the middle. You will see that the fuse has an element that is, "zig zagged" or shaped depending on the fuse. It will be broken or missing part of this piece so that it does not make contact with the 2 fuse blades. So, a good fuse will have a continuous element and a blown one will be missing a section.
So, you are looking for a 10 amp, which is red, or a 15 amp fuse, which is blue, that is blown. With the ignition off, use the puller to grab the fuse and pull it out. Inspect the element and replace the blown fuse. Turn the Dimmer switch all the way up and the LED should work. Double check the connection for the LED because they usually have an adapter that fits in the socket and the is connected to the LED.
If you have to go to that Auto Parts store for fuses, I would recommend getting what is called a, Smart Fuse". It is a fuse that lights up when it is blown. I use them as it is so much easier than figuring out which fuse is blown. They are so bright that it also gives you light to work by when you replace it. They cost a little more, but they are worth it. The name brand can differ, but I use ones manufactured by, "Smart Fuse". If you can't find them, just ask for fuses the light up when they are blown.
So, I get confused to when figuring out fuses, that is why they are worth it to me.
I hope this helps.
Saturday, February 12th, 2011 AT 9:08 PM