My Rear wiper does not work, the radio doesn’t seem to pick up many stations and I’m continually getting yellow check engine light.
Rear wiper motor died is a possibility , Radio needs replaced and a new one will much improved , Engine light on have the codes read and post them here or Google what they mean . If you are in the US most Autozone stores will read codes.
The radio and wiper issues are due to the wires pinched/broke or wore out between the hatch and body of car. You eventually will lose reverse lights.
The antenna is in the hatch.
They can get patched(temporary) or real fix is replacing the harness but requires headliner to come down.