Charging light is on (altenatoe was checked and ok)
I just had my altenator check because the charging light was on. I took it to a specialist to check out and he said it was ok. It was put back in the car and everything worked (no light ). I got it home and wanted to drive somewhere and the light was on again. What could this be??
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Re: charging light is on (altenatoe was checked and ok)
You may have a faulty alternator that is almost dead, intermitenly charging then not. If it stays on for a while longer, be careful because it could cause the car to die, as the car would be running on the battery until the charge was depleated.
Good luck, and hope this helps
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as its a used part it may not be in working order , check the charge rate by putting volt meter across the battery terminals when engine running , the reading should be around 13.5 -14 volts , if not then check the alternator belt is tight enough and retest the charge if lower than 12 volts then the alternator is useless , a non charging alternator will give the symptoms you've described, th ered icon is the non charging warning light , dont drive if the check is low as will ruin your battery as well, take alternator off and get a lift back to the supplier , best to by new
Disconnect battery while car is running. If car dies altenator is bad. With car not running check battery with volt meter. Should read 12 to 12.46 without engine running. Start car and check battery with volt meter, should read 13 to 13.50. If less than 12 with engine running then altenator is no good.
charge the battery then remove the negative cable from the battery and place a test light between the battery and the cable if the light is on you have a draw remove fuses until the light dims then the fuse you took out is the source of the draw also unplug the alternator as that can drain the system as well
Sounds like the alternator may be missing an excitation current source.
Check the 'IGN' dash indicator lights when you turn ignition switch on prior to starting motor,
if not one of the below may be problem:-
1) check exiter control wire is connected to alternator D+ terminal (low current wire, +V with Ign on),
2) replace dash 'IGN' indicator lamp.
I would check the altenator again. if you didnt disconnect the battery and a spark shot off while installing the new starter it could have decharged the spool on the inside of the altenator to where the spool no longer charges. if you have the altenator checked for consistant charging and it comes up good check the relay for the altenator it most like will have messed up the relay. to make a long solution short check the relay for the altenator it will be in the relay box under the hood.
with the engine idling, check the voltage at the battery terminals. if its between 13 and 14.6 volts the alternator is probably ok. If its below 13V you need a new alternator. above 15V same thing.
Why did u think it needed repair? is your battery not holding a charge?