Today I changed the right break bulb and decided to have a look why the third break (which is on top of the boot) is not working. I got the unit out which has 5 small bulbs, I checked them all and none of them looked dead, so I moved them around and pushed them in better to have a better connection and when I checked 4 of them were working so I got the non-working 1 out, looked perfect put it back in and I think it gave a bad connection or something as all the back car lights went off as well as the lights from the speedometer which comes on the second position of the key, only the mileage and clock is on the dash board now. The radio lost all the saved stations but it is working still. I checked the fuse box and found small fuse number 30 gone, so I bought new ones from Halfords and replaced it but the car still won’t start and the rest of the indicators on the speedometer won’t come on. The starter of the car will not start to spin at all so I thought maybe the battery is bad and tried to jump start it but still nothing. So for me this should be a fuse but I have checked all the fuses and they are good apart from the big square ones which I’m not even sure are fuses. Any advice or suggestion will be much appreciated. Thank you