To identify the main negative battery terminal post on your M1152 HMMWV, you can look for the following markings or signs:
1. Negative (-) Symbol: The battery terminal posts are usually marked with symbols to indicate their polarity. The main negative terminal should have a "-" symbol near or on the terminal post.
2. Color: Battery manufacturers often use color-coding to distinguish the positive and negative terminals. The main negative terminal is typically black or has a black cover.
3. Size: The main negative terminal is usually slightly smaller in diameter compared to the main positive terminal. This size difference helps prevent connecting the wrong cables during battery maintenance.
Always double-check the markings and ensure you have correctly identified the main negative battery terminal before proceeding with any maintenance tasks. Additionally, wear appropriate safety gear, such as gloves and eye protection, when working with batteries.