Answers
May 10, 2023 - 07:43 PM
Your AGM battery and charging mechanism may be perfectly OK for the voltage variations you're experiencing. Compared to conventional lead-acid batteries, AGM batteries require distinct charging procedures, and some changes in voltage when charging are typical.
The alternator normally produces a higher voltage when the engine is first started in order to quickly recharge the battery. The voltage will decrease to a lower level while the battery charges. It's normal for voltages to alternate between higher and lower levels; this cycle is known as the "charging cycle."
In order to avoid overcharging and increase battery life, certain alternators are made to lower their output voltage after the battery is fully charged. As a result, the voltage may then drop to about 12.7 volts.
Now, just to be sure there's nothing wrong with your charging system or alternator, you can have it checked by a qualified mechanic or at a nearby auto shop. To confirm everything is operating as it should, they can test the charging system and verify the output voltage of the alternator. Hope this helps!
The alternator normally produces a higher voltage when the engine is first started in order to quickly recharge the battery. The voltage will decrease to a lower level while the battery charges. It's normal for voltages to alternate between higher and lower levels; this cycle is known as the "charging cycle."
In order to avoid overcharging and increase battery life, certain alternators are made to lower their output voltage after the battery is fully charged. As a result, the voltage may then drop to about 12.7 volts.
Now, just to be sure there's nothing wrong with your charging system or alternator, you can have it checked by a qualified mechanic or at a nearby auto shop. To confirm everything is operating as it should, they can test the charging system and verify the output voltage of the alternator. Hope this helps!
May 13, 2023 - 08:04 AM
I think checking battery terminals loose connection or corrosion and check the ground that comes from your fuse/relay box that's in the engine bay, there's a good possibility that there's a bad connection or lose wiring that's where I would start.
Jun 10, 2023 - 09:21 AM
no definitely not sounds like a loose connection Maybe or could be a bad cluster
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The low of 12.7 volts and up to 14.3 volts are almost consistent with a normal charging voltage. You can try to use a different multimeter to see if it would give a similar reading. Some multimeters could be off their calibration settings. That is also one possible cause. I hope that helps!
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