Audi A5 Alternator Not Charging Battery

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Audi a5 alternator not charging battery. The battery warning light may go away randomly if there is. If you have voltmeter you should be able to test the voltage before car running voltage should be in around 11 12 volts if less than 9 volts you have bad battery and after running the vehicle the voltage should be 13 8 to 14 5 volts that means it is charging if the voltage has not changed than bad alternator or bad ground cable or. Starting and charging battery replacement audi a5 quattro battery replacement the car battery s main purpose is to provide electricity to the starter to start your the engine. Battery not charging the guy i bought this off its still at the front of his place says he had his dads friend take a look at it and he said it was a bad alternator.

It is more likely that that alternator is failing and unable to charge the battery sufficiently. If a red audi battery light comes on and stays on in your audi instrument cluster it indicates that there is a problem with the alternator battery or charging system. The cost of replacement depends on the type of car but is generally pretty consistent. Charging the battery only use battery chargers with a maximum charge voltage of 14 8 v the battery cables do not have to be disconnected.

To fix this problem charge the battery using a trickle charger. If a six month old battery on a 2001 audi s8 goes dead is the problem the battery or the alternator. I drove it the day before and it was fine. If a test shows that the alternator is faulty it should be replaced.

A trickle charger provides a small current that brings the battery back to a fully charged state. Why you shouldn t jump start an audi. Instructions in this guide apply to most audi models including a1 a3 a4 a5 a6 a7 q3 q5 q7 tt. If the alternator is not charging the battery your audi may only run for a brief time off the battery then shut off.

Either bad alternator bad voltage regulator or bad battery. It is rare but not unknown for a battery this new to fail. You must not use a battery which has frozen even after it has thawed because the ice may have cracked the battery casing and allowed the battery acid to escape warning.