Checking the alternator output voltage with a multimeter If no charging system tester is available, your mechanic can do a simple voltage test. The test involves checking the battery voltage with the engine off and with the engine running. The battery voltage should increase to more than 13.5 ...
How to check the alternator with multimeter The alternator’s job is to produce electricity and charge the battery. As you drive along the belt driven alternator takes over the role of delivering power to the car’s electrical systems and also recharges the battery. ...
Those of you who follow my thread on fiddling with my cars might remember that over the last year or so, I have had several problems related to batteries. In some cases, it was the battery, but I also had to replace the alternator and currently, my Jaguar is suffering from a slightly...