How to Install a Positive Battery Cable

Positive battery cables are susceptible to damage from factors such as frequent dismantling and handling during engine repairs and taking out the battery for recharging. The cables can get scratched or torn apart exposing the electrical wires. Exposed wires are dangerous and that is why you need to get new replacements for damaged cables. Not only are damaged cables dangerous, but they can cause your vehicle to break down on the road or highway. Removing and replacing a positive battery cable can be done within an hour. You have to follow certain procedures and safety rules to prevent injuries such as burns. Before you begin, you must get an electrical wiring diagram for the vehicle to locate the cables and see where they lead.

Tools and Materials Needed:

  • Open end wrench
  • Wrench set
  • Pliers
  • New positive battery cable

Step 1 - Turn off Engine

Turn off your engine apply parking breaks and make sure your work area is properly ventilated. If there is no proper sun light please use a light source.

Step 2 – Disconnect Cables

Disconnect the positive and negative battery cables using an open end wrench. Make sure the cables don’t touch any metal parts.

Step 3 – Locate Positive Cable

Follow the positive cable and locate the place where the cable is fixed to the starter. In some cars you’ll see the positive cable (red cable) leading in to the fuse box. In that case you should refer to your owner’s manual. Try not to pull the cables while you are following them because they might be attached to the connectors. Or, if the cable is already damaged you’ll end up breaking the cable so that it’s somewhat difficult to find the way to the starter.   

Step 4 – Remove Cable

Unscrew the bolt using the appropriate sized wrench and slowly remove the cable with care.

Step 5 – Attach New Cable

Now get the new cable and fix the flat eyelet end to the starter.

Step 6 – Fix New Cable to Battery

Fix the cables to the battery and close the hood. 

Step 7 - Take Precautions

  • Be careful; do not touch the wrench or cables in the body of the car or any other metal part while removing the cables.
  • Avoid the new cable contacting moving parts such as cooling fans and belts.
  • Avoid the cable contacting with hot sources such as muffler of engine.
  • You can use appropriate heat insulators to avoid melting the cover of the cable.
  • Do not use it if it’s too long or too short.
  • Work in well-ventilated area as batteries release harmful fumes.
  • Wear appropriate gear such as eye protection and glows.