1980 mgb fuse box diagram : MGB & GT Forum : MG Experience Quote: My 1980 mgb has a bad battery drain and I think I may have caused it by installing my new radio I would like to know were I can find a wiring diagram so I can see which fuse supplys what It seems I have a draw through the fuse that is second from the bottom 1980 MGB/LE Fuse Block Problem | MG MGB Technical | MG If you have removed the fuse box you have to properly orient the box so the link connecting two sets of terminals are at the top and toward the front of the car. The link is on the back side of the fuse box. Bottom Fuse. Brown wires are attached on the front side. Purple wires go on the rear side of the bottom fuse. Next fuse up from bottom. 20 MG MGB '77-'80 Electrix - YouTube Click to view on Bing4:17John Twist explains the electrical system for 1977 through 1980 MGBs. John Twist explains the electrical system for 1977 through 1980 MGBs. 1978 MGB - Part 7 Replacing the fuel tank and fuel pump!Author: UniversitymotorsltdViews: 51K Electrical Tips - MGB Register Locate the fuse block and check the fuse which joins a white and green wire. Clean the clips with fine emery cloth and replace the fuse. If the fuse was ‘blown’, there is probably a fault in one of the circuits the fuse protects. Try to narrow the field by trying the horn, indicators etc until you find which blows the fuse. MGB 1980 MGB wiring diagram help - British Car Forum Howdy folks, I jumped the fence from the Triumph forum. A friend of a friend has a 1980 MGB Vin number GVDJ2A6514249, the VIN plate is stamped 04-80. After a long restoration he is trying to get it cranked up and the info he has (a wiring diagram from the PO) shows the starter wire going to the light switch. He says that when he tries to start it, things start to smoke.