wireing problems

[MUD JUNKIE]

ok,here it goes.my electrical system is all funked up.
none of the interior lights work,no turn signals,no flashers and when I step on the brakes my front flashers BOTH light up.I've checked every fuse and there all good.I've even replaced the round flasher fuse. where to start? what the hell is wrong with it? its a 79'chevy K20

 

[ugly_blazer]

Maybe a ground wire problem? /forums/images/graemlins/dunno.gif Check the ground wire from the battery to the core support and the ground strap from the firewall to the engine block.