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Answer CHECK AUTO VOLT REGULATOR OUTPUT.WITH ENGINE OFF CONNECT DC VOLTMETER ACROSS BATTERY POSTS. METER SHOULD READ ABOUT 12.5 VOLTS. START ENGINE: VOLTAGE READING SHOULD INCREASE TO 14 OR SLIGHTLY MORE VOLTS.,

Unless the problem is the generator or alternator, in which case the same symptoms will appear. Nice try, but no cigar.

That is not entirely correct, you would be correct if reading the charging system voltage on a 12v system.

On my 4wheel 350 bruin it is around 10v and the xl250 1982 is around 8v, to check the generator/stator you need to read AC voltage and after regulator you need to check DC voltage, most people use the headlight check to see if the regulator is working fine, imo get the manual for the correct reading/maintenance procedures or elaborate on the question with the model and year of the vehicle in question.

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Q: How do you check the voltage regulator?
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