tail lamp fuse - I know another thread but this is not my first go

[Moore]

I'm posting as a last resort as I've been working on this goddamn electrical problem all week.

Taillamp/interior light fuse blows. I can get it work until I start the car. So ignition off lights on fuse stays on, then start car and blow.

I've taken out all bulbs and tested front rear and sides, 1 by 1 to see if that makes a difference. Removed my centre console checked radio illum, and gauge illum wiring nothing to be found. Removed wheels and looked for any rubbed wires going to front lights and side markers nothing found. Rewired front lights without the plugs as they looked a little corroded - no change. I've gone as far as cutting my front bulb holders out in case they were corroded, made no change.

Removed headlight switch and checked for corrosion but it seems to be okay. I'm still leaning towards the headlight switch because of the fact they blow when I turn the car on but I don't want to throw money just guessing.

Is there anything else I'm overlooking?