Hello, What would cause the battery light to produse a rhythmic pulse while driving? We have a new voltage regulator and we have cleaned and re-wired the connections going to the battery. Getting 14.4 volts....no troubles with charging. Thanks.

Problem with incomplete rectification of a/c current into dc current.

Bad diode..

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This probably a stupid question from a non-electrician: where is there any AC current?

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Can you change the diode easily?