How To Check If Your Battery Or Alternator Is Bad. Using a multimeter set to measure current amps should you have current flow between the battery and alternator with. Heres what to do.
You need to start the car by keeping the hood open. See Offer Details Today. Some of the things to look for are no-starting and trouble starting dimming lights and problems with stereo system output.
Your battery is required in order to start and run your vehicle which will in turn spin the alternator at a high enough speed to keep the battery.
At this stage you need to disconnect the car battery while the car is still in a running position. To test whether an alternator is draining the battery with the cars engine switched off disconnect the cars electrical system leaving the battery only. Note the reading on the meter you should have at least 12 to 13 volts. At this stage you need to disconnect the car battery while the car is still in a running position.
