1999 park avenue cruise control does not work. Fuse OK. Brake lights work. Testing the multifunction turn signal switch indicates the resume switch is not working or open. Will the resume switch cause the entire cruise control system NOT to function.
Looking at the schematic, it should still set even if the resume/accel switch is open. It is normally open in all conditions unless it is depressed. All switches are inputs to the cruise module. If there are any powertrain faults stored, that can inhibit cruise operation, so check for powertrain dtc's. In addition to the stoplamp switch input to the cruise control module, there is also the ABS/TCC switch to consider.