I ordered cheapos and one of the three bulbs was defective. The other two work great and are a nice upgrade. If you know the bulb is good, you might need to check the receiver socket for corrosion or breakage. Pretty sure there is a spring under there you should check for proper operation. Running some fine sandpaper over the connection points can sometimes help. It’s also possible your turn signal switch might not be working properly, if you haven’t already ruled that out. Other possibility might be a bad wire.
You can buy a new housing for as low as $24, depending on what year your bike is. If I had a spare I’d send it to you, but I currently do not have one.