Learn How Battery Isolator Works for Your Car

by John Faust Web Developer and graphics artist

An automotive electrical system produces enough electrical power for an automobile to run the ignition system. Charge the battery again and supply power for electronic devices inside the automobile. 

Some automobiles take advantage of this extra electrical capacity to sustain a 2nd onboard battery pack. Typically, a vehicle with more than one battery has a system called a battery isolator set up.

 A battery isolator splits many batteries from one after another to make sure that an automobile has access to a support power source. In addition, a battery isolator kit assures that automobile's electrical system does not pull electricity from a variety of batteries concurrently, which would quickly drain all of the batteries and increase the risk for the electric system to fail. A trouble-free setup is one in which a motor vehicle contains 2 batteries, where each of them are connected to the isolator. 

The dual battery isolator system of is linked to the vehicle's alternator, which is the device in charge of providing the automobile with electrical power and for charging the vehicle's battery. The dual battery isolator system uses sensors to look for the number of batteries it is linked to and to pull power from the more loaded battery. The inactive batteries are charged by the alternator, and the battery isolator can quickly switch power sources if the battery in use suddenly fails.

Right way to test a battery isolator

Considering that a battery isolator is directly connected to the vehicle charging kit, it is essential to make sure that the isolator works accurately at all times. It is crucial to check the voltage at the isolator terminals while the engine is operating. The following easy steps are common ones that teach you how to check  a battery isolator given by an expert from

1. Link up the black (negative) meter probe to an unpainted element of the automotive frame. Start up the gauge, and set the scale to "Volts DC."

 2. Place the red (positive) meter probe within the isolator "A" terminal, and look at the meter screen. The current should be around 13.8 and 15 volts. If the voltage at the "A" terminal falls outside that range, there could be an issue with the charging system; immediately stop the examination and have a certified mechanic inspect the automotive.

 3. Place the red probe on the isolator "1" terminal, and look at the meter display. The voltage has to be between 13 and 14.5 volts. If it’s voltage is past that range, the primary battery may be excessively or short in charging, and the isolator should be changed.

 4. Place the red probe on the isolator "2" terminal and examine the gauge screen. The voltage should be between said 13 and 14.5 volts at the same time. If the voltage is outside of this range, the second set of battery may be over charge, thus, the battery isolator instrument must be replaced.

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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