No, don't try it on computerized vehicles. Connecting and disconnecting a positive cable from the battery causes voltage spikes in the signals going through wires. You can easily burn out electronic circuits in computers. This is why the old school method of testing for a working alternator by pulling off the positive cable from a running engine, had to be abandoned and discouraged. The electronic circuits on computerized vehicles don't like those voltage spikes, so never take a battery off with engine running or key in the on position. That old school system worked so well that many a diy'er kept trying it on cars with computers. Bad results followed.
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No, don't try it on computerized vehicles. Connecting and disconnecting a positive cable from the battery causes voltage spikes in the signals going through wires. You can easily burn out electronic circuits in computers.
This is why the old school method of testing for a working alternator by pulling off the positive cable from a running engine, had to be abandoned and discouraged. The electronic circuits on computerized vehicles don't like those voltage spikes, so never take a battery off with engine running or key in the on position. That old school system worked so well that many a diy'er kept trying it on cars with computers. Bad results followed.