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Guides in Installing Dual Car Battery Isolator

by John Faust Web Developer and graphics artist

It is huge dilemma when your car suddenly dies on you, especially when you don’t have the luxury of time. Such happenings occur without warning. But fear not! The solution is simple: have a backup battery. 

 Here are the step-by-step procedures on how to install extra battery and a car dual battery isolator kit of www.dfna.info to your vehicle.

  • Open your car's hood and trunk and remove the negative (ground) cable with a wrench to disconnect the battery.
  • Mount the battery. Choose where you want to place the battery box in the vehicle. (It is advisable to place it in the trunk.) Put a bit in the drill motor and drill the mounting bracket of the battery box to the floor of the trunk. Put the bolts through the drilled holes and make sure to tighten them using a wrench. Drill another hole near the battery box for the new positive battery cable to go through. Put a rubber grommet in the hole.
  • Mount the isolator (the isolator is found in the engine compartment). Place it inside of a fender and hold it in place. Place a screwdriver bit in the drill motor and run a self-tapping screw through the mounting bracket hole and into the fender. Do the same for the other bracket mounting hole.
  • (Wire the isolator) Install www.dfna.info dual battery isolator. Put the new battery in the battery box you just mounted and secure it with the mounting hardware that came with it. Make sure to tighten it with a wrench. Run a piece of a 4-gauge (or heavier) wire from the battery box, to the rubber grommet, along the chassis, into the engine bay, and to the new isolator. Use plastic zip ties to put the wire in place along the chassis. Run the same type of wire (4-gauge or heavier) from the original battery’s positive post to the isolator. Use a wire stripper and strip all four ends of the two new wires. Attach terminal ends on each end of the wires. Use crimping pliers to secure the ends.
  • Connect the positive wiring. Attach the terminal end of the positive wire of the trunk into the corresponding positive post of the new battery. Make sure to tighten it with a wrench.  Attach the terminal on the other end of the wire to the A (auxiliary) isolator post. Again, make sure to tighten it with a wrench. Put the terminal ends of the positive wire of the original battery to the same battery’s positive post. Put the other end to the isolator post marked as M (main) post. Make sure to tighten with a wrench.
  • (Ground the system) Run a piece of a 4-gauge (or heavier) wire from the negative post of the auxiliary battery box through to the trunk floor. Use wire strippers to strip both ends of the wire. Attach the terminal ends to stripped wire using crimpers. Connect one end to the negative battery post and tighten it using a wrench. To connect the opposite end, attach a screwdriver bit to the drill motor and run a self-tapping screw through the terminal end and to the floor of the trunk. To attach the ground wire of the battery isolator kit to the chassis, place a screwdriver bit to the drill motor and run a self-tapping screw through the terminal end into the chassis with a screwdriver. Reconnect and tighten the original ground strap to the original battery. Make sure to tighten it with a wrench.
  • (Complete the installation) Run a piece of 18-gauge wire from the ignition post (IGN) of the isolator to the ignition (IGN) terminal of the fuse box of the vehicle. Using a wire stripper, strip both ends of the wire. Use crimpers to install terminal ends to each end and secure. Connect one end of the wire to the isolator post. Make sure to tighten it with a wrench.  To connect the opposite end of the wire to the fuse box, slide the terminal end to the lug. Close your car’s hood and trunk.

IMPORTANT TIPS:

  • If there is not enough space, using a gel-cell battery will enable you to place the battery sidewards or upside-down.
  • Make sure to disconnect the battery from the wiring system before working on it. Otherwise, it may short-circuit and damage your vehicle.
  • Visit this article to check your dual car battery isolator if functioning.

About John Faust Innovator     Web Developer and graphics artist

31 connections, 0 recommendations, 85 honor points.
Joined APSense since, May 10th, 2011, From Tampa, United States.

Created on Dec 31st 1969 19:00. Viewed 0 times.

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