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Measuring Procedure

  1. Measure the voltage "V1" across the battery (BAT1). If the reading is between 10 and 13 volts, the battery is normal.
  2. Measure the voltage "V3" across both the batteries (BAT1, BAT2). If the reading is between 20 and 26 volts, the batteries are normal.
  3. Gradually increase the resistance of the variable resistor from zero. Measure the voltage "V2" (the voltage across the F and E terminals. Check to see that the voltage across "V1" changes at this time. If there is no change, the voltage regulator is faulty ad must be replaced.
  4. Measure the voltage at "V4" (the voltage across the variable resistor center tap and terminal E with the variable resistor resistance held constant). The measure voltage should be 14.1-14.7 volts. If it is not, the regulator must be replaced.
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