How To Check If Alternator Is Bad On Car. Of course a weak or dead battery could also be a problem. If the alternator is starting to go bad it cannot charge the battery as efficiently.
The test works in this way. The following steps address how to test an alternator with a multimeter. Open the engine bay and look for a device with a pulley linked to the serpentine belt which has two wires.
How an alternator works and how to fix it.
Make sure your alternators positive and negative. Does your car not start do you have dim headlights or interior lights do. To check for a possible bad alternator diode switch your voltmeter to a low setting on the AC alternating current voltage scale. Contrary to what may seem like a bad battery an illuminated battery light does NOT mean the battery is bad it means the.
