electrical gremlins are back

I have my voltmeter connected to the voltage regulator (I have a grommet for all my aftermarket gauges that go through the firewall so I tested and found that was a switched 12v source) so I have full 12v at the starter relay, voltage regulator, and alternator. When I open the car door, the voltmeter reads 10v and drops down to nothing once I close it. Inside the cab there is nothing. No lights, radio, heater blower or anything at all. When I turn the key, my voltmeter reads 12v however. What is weird, when I use my multimeter to find where I have power in the car, I only get .2v at the welded splice. But I was getting 12v at the splice of the black and red wires that are spliced into the fusible link that go to the starter relay. I think I covered almost everything. I am at a total loss right now. Oh and yes I can jump the starter relay to start the motor.