Pressing Start for any cooking selection turns circuit breaker off

Having just replaced a bake element in the GE electric wall oven below it myself yesterday, now the microwave ( Model JE1640AB 001 ) cuts the circuit breaker off when pressing Start for any cooking selection. I don't see any plug for the microwave in the cabinet above it, so I suspect it may be connected to the same electrical outlet as the GE wall oven below it which I just fixed. Therefore, I went back and redid the bake element replacement to make sure the wires were properly connected, and they appear to be OK.