[Richard]

Only thing I did notice, on the blower relay with a meter just prior to the fan quitting I could see the voltage go down which ultimately causes the amperage to go up which resulted in the compressor to overheat and then the breaker popped.

You could hot wire around the relay to see if that is the problem.

Also, and I feel like I have beat this point to death on the forums, please check all the wire connections supplying power to the unit. I found four different occasions (all three units on 390, and one unit on 512) that the wire nuts had vibrated loose just a bit and the connection was not tight resulting in burned wiring.

I have converted to this connection for my AC compressor wiring to circumvent the problem. https://www.amazon.com/King-Innovation-9...B003ZFUHOG Some Lowe's stores also carry them.