The batterys negative side should be touching the spring when its installed. The battery cables can spark if the cables are installed in the improper order. It can also happen if any metal touches the battery post or uncovered wire. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The surge current that flows into the controller is due to the largeCapacitor that gets charged Its not unusual to spark that you have. But, avoid connecting the black-end clamp to the dead batterys negative terminal because that can lead to sparking and even damage the battery. In very simple terms, if theres too much electricity in a part that cant handle it, the electrons branch out into the air. If the battery spark over and over again, the spark can potentially light the gasses and cause an explosion. They are not quite the same thing. I connected a voltmeter positive lead to the compressor housing and negative to the negative terminal of the battery. Necessary cookies are absolutely essential for the website to function properly. The bulb has non-negligible resistance, and since voltage is constant and V=IR, there is less current flowing through the wire, so there are no sparks. What happens if you touch battery cables together? The other vehicle should be followed by the other vehicle. Anything other than going out indicates a constant drain on the battery. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? Avoiding the last connection directly to the dead negative is to avoid sparks near the dead battery, but this also avoids sparks near both batteries since the good one is securely connected at this point. The chance of fusion and arcs increases with the voltage. The battery cables that are on your car are used quite frequently. If you have a hood light or doors open, those lights will come on. If your car has a hood light or doors open during the process, those lights will turn on and cause a tiny spark on the battery negative terminal. Home | About | Contact | Copyright | Report Content | Privacy | Cookie Policy | Terms & Conditions | Sitemap.