MG Car Repair: 1979 MGB electrical problem, fuse block, hazard light

Question
I am working on my father-in-law's 79 mgb that has been sitting for a couple of years due to the fact that it had a drain on the battery that nobody could resolve, so I'm determined to get it fixed and back on the road for him. To make things a little more complicated the engine has been replaced several times by different people and I found evidence of an electrical fire under the dash (which has now been properly repaired). Originally the ignition light,fuel pump,heater fan,ignition coil,etc... always had power even with the key out. I've spent numerous hours checking,fixing and cleaning connections,I also replaced the cracked fuse block. Occasionally it would not turn off with the key, (I had to remove the battery cable) so I disassembled and cleaned the ignition switch. This seems to of fixed all of the intermittent problems that I was experiencing. Now it seems it's the hazard light circuit that has been feeding power to the aforementioned components (except for the ignition light, which works properly now). If I remove the in-line fuse for the hazards every thing appears to operate normally through the ignition switch except the hazards obviously), if I replace the fuse everything continues to be powered with key off, but if  I turn the hazard switch on I can hear the fuel pump shut off when the hazard lights turn on. I've been looking at schematics untill my eyes go crossed, please steer me in the right direction. Thanks

Answer
Hi Matt,
Your symptoms do not tell me anything. I found from working in dealerships that any time I had an electrical problem I had to take a wiring diagram and look at only one circuit that was not operating correctly and trace that one circuit only and you have to find what is at fault by following that one circuit from load to power. Most of the time when I would do that, it corrected other faults too. In your case I would unplug the flasher switch and use your wiring diagram to check each circuit of the flasher switch one at a time to see if any are powered that should not be powered. If all the wires (circuits) going to the flasher switch are connected to only where they belong then there has to be a problem with the flasher switch.
Howard