What would likely happen if you connect the battery terminals in reverse?

Connecting battery terminals in reverse is likely to cause potential damage to electrical components. When the terminals are reversed, the polarity of the electrical current is altered. This can lead to a situation where sensitive electronic components, such as the vehicle's computer or other critical systems, may receive incorrect voltage levels. These components are designed to operate with a specific polarity, and reversal could result in overheating, short circuits, or even complete failure of those systems.

The design of many electronic devices includes protective measures, such as diodes or fuses, that may help mitigate damage, but it is not guaranteed that these safeguards will be effective. Therefore, while some systems might survive a reverse connection, many others could be irreparably harmed, leading to costly repairs or the need for replacements. Understanding the importance of correct battery terminal connections is crucial in both automotive and electrical applications to prevent these types of failures.