Wdanb,

First thing, unplug the power cord or turn the power off at the breaker,

Remove the oven door and remove the element,(leave the wires attached to the element), and program a broil cycle and setting. with a multimeter set on a VAC setting, check for 220 to 240 VAC across the two terminals/wires on the element.
*** If you disconnect the wires and terminals from the element, and check the voltage to chassis ground:
The yellow wire should have a constant 120 VAC.
The blue wire will have 120 VAC, only when the broil selection is made.

No voltage on the yellow wire, would indicate a damaged wire between the two elements.
No voltage on the blue wire, would indicate a damaged blue wire between the clock/control or a damaged relay on the clock.

Part number: AP4279499