Which Cable Do You Disconnect To Check Alternator. Instead use a voltmeter to perform a basic and safe test. A good alternator may indeed keep the engine running without the negative cable but this was never a good test.
In the pre-computer days you could pull it off without damaging anything. There are two simple tests for checking your alternator. Aug 23 2010 0632 PM.
In the pre-computer days you could pull it off without damaging anything.
Alternator test with a voltmeter If youre tempted to test an alternator by disconnecting the negative battery cable dont do it. Remove the drive belt. Reposition the protective boot 2 from the generator output BAT terminal. Check twice to see if the car is in a stable position.
