Hi, To start have you replaced with the right AMP fuse? I cannot make out the first part of your Q!! have you added something electrical to your van? Spot lights/ Sat Navs etc. Have you changed any bulbs ( have you replaced the right ones Eg/ brake light with a double filament bulb ( Yes they will fit) are your fuse contacts clean? your brake light switch should be attached to the brake pedal! is there any broken wires there? If all has been checked my advise is to seek an Auto Electrician but do not be tempted to put Silver paper on the fuse ( That has been done with severe results).