Why does my aftermarket radio have no AM reception?

Poor AM reception in an aftermarket radio can be due to several factors, including improper grounding, interference from nearby electronic devices, or a lack of a proper antenna. If the antenna is not compatible or not installed correctly, it may not pick up AM signals effectively. Additionally, some aftermarket radiOS may have a weaker AM tuner compared to factory models. Checking connections and ensuring the antenna is suitable for AM frequencies can help improve reception.