Buy a quick connect for the ground cable. I have a short in a van I seldom drive and can't find the short. So I just unhook the ground cable when it's parked. Only takes a couple seconds. That will give you time to find the problem. The quick connect was less than $10.

 

Thanks hanky can't read amps with meter I have, guess I just have to disconnect battery every time till I get some extra cash to take it to shop.

 

You give up too easily !!
Try a few sites or google , voltage drop testing.
It is not difficult and you will be surprised how easy it is.
You have the voltmeter , the vehicle and the time. No extra $ required.
All you do is check the voltage drop across each fuse.
If you are unsure of testing electrical problems this will help you a lot.
There is always the possibility the drain may not be protected by a fuse , but maybe a fusible link. Simple thing to check across all the fuses first especially those that provide constant power without the key being on. You can do it !!!

 

Don't know if this will help, but I had a 1985 Ranger and had the same trouble. My battery would die overnight too. It ended up being a bad ground on the alternator. I just ran a wire from the alternator mounting bolt to the chasis. It fixed the problem. Good luck!