You are watching: What is the proper battery cable connection
Disconnect the negative cable native the engine block. Remove the confident cable from the solenoid, relay or starter.
Clean both battery short articles with a cable brush. Affix the confident cable to the solenoid, relay or starter. Attach the other finish to the battery post and also tighten both ends v a wrench. Affix the negative battery cable come the engine block where you took it off. Affix the other end to the an adverse post top top the battery and also tighten both ends with a wrench.
affix one finish of the jumper cables to the positive (+) next of the dead battery. Constantly start with the positive (+) cable. Affix the other finish of the jumper cable come the optimistic (+) next of the fully charged battery.
affix the an adverse (-) next of the jumper cables to the fully charged battery first. Connect the other end of the jumper cable to the engine. Situate an unpainted bolt or nut and place the other finish of the jumper cable ~ above it, being certain the bolt or nut is complimentary of grease and dirt. This will let you start your vehicle.
Connect a 2nd battery in parallel v the very first battery, i.e., hook the negative (-) write-up from the an initial battery come the negative (-) post on the second battery first. Hook the positive (+) short article from the an initial battery to the confident (+) post on the second battery.
Remove the nut from the an unfavorable (-) cable and take the cable turn off the battery. Take the nut turn off the optimistic (+) cable end and place the eyelet that the new cable top top the bolt, then change the nut and also tighten with a wrench. Ar the other end of the cable ~ above the hopeful (+) post on the 2nd battery, tighten through a wrench.
Connect one cable end to the an adverse (-) post of the 2nd battery and tighten through a wrench. Location the other finish with the eyelet on the an unfavorable (-) cable end bolt on the first battery and replace the nut. Reconnect the cable to the very first battery and also tighten nut v a wrench.
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Jesse Vibbert has actually been a grasp mechanic and also has worked in automotive and truck parts stores because that 40 years. He has recently composed articles around automotive fix for various websites.