Low voltage. battery light is on and put new battery in it

A simple circuit looks at the voltage that the alternator is producing, and turns thebattery light on if it is low. The battery light indicates a battery charging problem.

Aria shows a low battery symbol - Fitbit Community

https://community.fitbit.com/t5/Aria/Aria-shows-a-low-battery-symbol/td.../2685108

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The battery light doesn't mean you need a new battery it means that the battery charging system is faulty, that is the alternator and the voltage regulator, the lights are on because the system voltage is low, they will not turn off until the charging system problem is diagnosed and repaired.

No, not the ECM. Replace the alternator. The ECM fields/grounds the alternator to work. The ECM monitors the voltage and sets the light if voltage is to low or to high. Since it puts out 16+ volts the ECM is still working. The regulator in the alternator is bad.

when you hear a clicking sound it means your battery voltage is too low The battery posts and clamps need to be cleaned and put back together. Did you leave lights on or something to kill the battery? Or is the battery not charging? You may need a new battery and a new voltage regulator. Is the belt tight? Is the alternator producing a voltage or is it time to get it serviced or replaced? These are rhetorical questions of course.

Check the belt tension for the alternator. Have load test done on the batteries as if one battery has a bad cell it will cause a charging problem

Probably a faulty voltage regulator.

1- battery with low voltage or out of charge for several days 2- excessive usage of electrical equipment esp. the lights while the engine off 3- low battery fluid level 4- and rarely, hyper voltage supplied to the bat. 5- check the dynamo belt (loose)

Could be the alternator output too low. If it is not producing enough voltage then your new battery will eventually run down.

Charging voltage measured at the battery with the engine running should be 14.5. 12.5 is too low. Since you replaced the alternator, I would start checking connections. Such as where Neg battery cable attaches to chassis and ground strap between engine and frame. On a vehicle this old look for corrosion in the charging circuit cables and connections.

Your alternator is on the way out,replace with new or rebuilt. you can remove alternator and have it bench tested to be sure.