so, i failed MOT. there was no brake lights. fixed that it was loose connector on brake light switch but i found that parking light fuse was burning hot, measured current draw it was 5.6amps, seems to be common problem to melt fuse box.
i did my math thought aging pressed pins heat cycles might have added resistance between those two connection so i soldered every connection.
as i said earlier every load has dropped voltage slightly, no load its 13.8volts, press brake and it drops 13.3V. lights on wipers on fan at full blast i remember seen under 12volts on lighter socket.
lets see how it goes after this work, if that park light fuse still gets hot first aid is led bulbs