Usually the appropriate warning light on the dash will come on if the alternator is not producing current. If you don't trust the warning light, take a volt/ohm meter and (making sure it is set on the DC reading scale) connect it across the output terminals of the alternator to determine if any current is being produced.
Looks like the alternator has stopped working
FYI - I had a bad alternator. Apparently, a failed alternator may/can/will cause the battery AND brake warning lamps to come on. Alternator has been replaced, and all warning lamps cleared.
sounds like it is your alternator if the battery is new are you running any other electrical off your car?? subwoofers? tvs? take your car in and ask them to load test your alternator
If your talking about the 2 red warning lites then one is the "generator/alternator not working" warning light and the other is the "low pressure/no oil" warning light. The sensors may be bad or the wires came off or are broken.
The alternator light is a warning that there is a problem with the charging system. In most instances it means the alternator has failed. Any auto parts store can check your system and most will do it for free.
It means the electrical system is not working correctly. The most common fault is a broken alternator drive belt.
Check to see if the alternator is working Connect a voltmeter to battery: Without engine running reading should be about 12.8 With engine running reading should be 13.8-14.2 If not bad alternator
If your warning lights have activated after replacing the alternator, it could indicate a few potential issues. First, check if the new alternator is functioning properly and that all connections are secure. Additionally, inspect the battery and its connections, as a weak or faulty battery can trigger warning lights. If the problem persists, consider having the vehicle's electrical system diagnosed by a professional to identify any underlying issues.
On the V6 it is above the AC compressor and driven by the same belt. On the front of the engine and passenger side. You have to relieve the belt tension and remove the mounting bolts. Also remove wiring. Warning: The alternator has a hot wire. Remove battery ground before working on alternator.
Any particular kind of car and motor?
The alternator switches off