Datsun 210 tailights not working

[pnw210]

my 1981 Datsun 210 2 door sedan brake lights wont turn on and my interior lights dont work either. Sometimes all of it comes on and works fine except my Amp light stays flashing red. Ive tried messing with old connectors and cant figure it out. Anyone know anything that could help me out? thanks in advance. 

[KELMO]

Check for a loose ground.

[datzenmike]

Interior and brake lights are directly connected to the battery through a fusible link, and dion't require the ignition switch. Next time they fail to work, check for power on these fuses. Could be a fusible link.

[pnw210]

Thanks you guys, ill try to upload pics of my car tonight

[pnw210]

I messed with all the grounds and got my Amp light to turn off but i hit a pot hole and it started back up. When i was looking for another problem i noticed everything coming off my positive battery cable is old and corroded, the 2 connectors are almost completely eaten away. Could i just hard wire all those lines to my positive battery terminal??

[datzenmike]

You can but they are actually fuses. They will 'blow' if you should have a catastrophic accident where wires get crushed and would melt and cause a fire.