1998 grand prix gtp won't start, cleaned the battery connections still won't start. was running just fine, after trying to start the interior lights are dim but seem to slowly get brighter.
I think it's time to replace the battery. have you tried to crank it after someone gave you a jump? if it starts than replace the battery. there's no real way I can tell you how to check the charging system unless the car is running.
If you have a Multi-Meter, you can easily check the cars charging system. Make sure the switch on the Multi-Meter is on 20V, and check the voltage of the battery. It should read at least 12 V for it to be a good battery. As for your charging system, you will need the car running. When it is running, do the same thing, and see what voltage you get from your battery. If your charging system is working correctly, It should read a little higher then your original reading due to the alternator re-charging the battery.
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