Cigarette lighter not working on my 2004 honda civic after using a fridge on it (successfully for 2 years). Firsly it blew the fuse, but a second fuse hasn't blown.Measuring on a meter, both ends of the fuse block are dead.Is there another fuse in this line or a relay?

Usually if it doesn't come back out, it is just the fuse. But occassionally it will be the whole assembly. Try the fuse to be cheap first, if that doesnt work, go to autozone or advance auto, pick up the assembly that fits your car year, and it is a snap to install. There may be a clip somewhere holding it in tightly, or it may just screw in and out. Hope it gets to working for you.

check the power in the lighter socket or the charger which is a small transformer has not failed . Try it in another car . If it works there then I would suspect a fuse for the lighter if there is no power there.. Make sure that the adaptor plug is tight as the 2 bars on the side are the earth for the adaptor and if not tight then there may be no earth . Use a flat bladed screw driver and bend the bars out a bit to increase tension in the socket.

Looks like you overloaded and blew the cigarette lighter fuse while using a 12v tire inflator pump. Check the fuse and replace it.

try to tighten lighter element to lighter handle, if this does not work replace the lighter assembly

you could be lucky and the fuse blew, and it could be a burned wire, check the fuse panel and replace the fuse if blown, if it blows again you have to fix the wires, and possible the cigarette lighter if it got damaged

You might have a blown fuse, check the fuses. if the lighter does'nt heat up the lighter itself could be bad and need to be replaced, or the outer shell that holds the lighter might need to be replaced.

They probably share the same fuse. Sounds like cig lighter coil is shorted and "fiddling around" blew the fuse. Replace the fuse and try a different lighter coil.

It would be fuse 27 in the underdash fuse box, 10amp

look on the cover of the fuse box