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Thursday, January 28, 2010

Connecting A Battery Isolator

By Rob King

The following article shows how to connect a battery isolator. The isolator is installed when the car needs a second battery. This will be required by cars that have bigger stereos. Since more power is needed second battery is added with the help of an isolator.

Battery isolator is a device that instructs the alternator to charge the secondary battery and also protect the primary battery from being drained. Battery isolator can be of different type but the most efficient and cheapest of them is solenoid type isolator where the isolator connection is achieved when the engine is on, off when the engine is off .The instructions on how to connect a battery isolator follows.

Open the front hood and place the secondary battery in its corresponding tray using a 3/8 inch socket and ratchet. Make sure the battery is properly in position and should not be kept tilted. Using a driller mount the battery isolator then connect the terminal of battery isolator to the positive terminal of the battery using a battery cable. The wire connecting the battery and isolator are stripped and held in position using the 3/8 inch ratchet and socket.

In the next step with the help of drill the battery isolator is mounted to the fender. For more secure connection use the brackets and self tapping screws that comes along with the battery isolator. A 4 gauge battery cable is used to connect the two batteries. It joins the positive terminal of the battery to the right side of the battery isolator. In the same way we have to connect a wire from the positive terminal of the first battery to the battery isolator. This is done using a 3/8 ratchet and socket.

The wire strippers are used to strip inch off the other end of the 18 gauge wire. A ring terminal is crimped on to the end of the wire using the wire crimpers. the wire is connected to the ignition terminal on the battery isolator using a 3/8 inch ratchet and socket.

A 18 gauge wire run from the ground terminal on the battery isolator to the ground source on the frame. a wire is bolted to the frame on the passenger side. A ring terminal is crimped on both sides of the wire using wire crimpers and it is bolted to the ground point and the battery isolator using a 3/8 inch ratchet and socket.

The negative terminal of the secondary battery is connected to the ground point on the frame using a gauge wire and is bolted on the either end to ensure connections, now the secondary battery will start charging only when the engine is on.

It is easy to couple the secondary battery with the primary battery using this manual on HOW TO CONNECT A BATTERY ISOLATOR where it eliminates the need for supervision. - 21392

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