What might occur if battery terminals are not tightened properly?

If battery terminals are not tightened properly, increased resistance in the electrical system can occur, leading to starting issues. When the battery terminals are loose, there is a poor connection between the battery and the vehicle's electrical system. This poor connection can prevent sufficient current from flowing from the battery to the starter motor, which is essential for starting the engine.

Increased resistance at the connection points not only limits the flow of electricity but can also cause electrical arcing and overheating. This resistance can result in a situation where the engine cranks slowly or fails to crank altogether, indicating that the power required to start the vehicle is insufficient.

Furthermore, ongoing issues with loose battery terminals can lead to battery drain, problematic electrical accessories, and further battery and alternator strain, exacerbating the starting issues over time. Thus, ensuring the battery terminals are securely tightened is critical for optimal electrical performance and reliable engine starting.