Kamis, 26 Mei 2011

How to Check a Harley Voltage Regulator

How to Check a Harley Voltage Regulator

The voltage regulator on a Harley-Davidson motorcycle takes the AC current supplied by the stator/rotor and converts it into 12 volts DC. The regulator is typically located on the front of the motorcycle, mounted to the frame. It is an non-repairable part and it must be replaced when it breaks. Checking its function involves the use of a digital multimeter and a trouble light.

Difficulty:
Moderately Easy

Instructions

Things You'll Need

  • Trouble light
  • Digital multimeter
  1. Regulator Bleed Test

    • 1

      Unplug the regulator from the engine crankcase.

    • 2

      Touch a trouble light to a known ground on the motorcycle and to the pins in the regulator plug, one at a time.

    • 3

      The regulator is bad if the trouble light comes on. If not, reconnect the regulator plug to the engine crank case.

    Voltage Output Test

    • 1

      Place transmission into neutral and start the motorcycle.

    • 2

      Place the positive and negative leads of a digital multimeter onto the positive and negative connections of the battery. Set the multimeter to read DC volts.

    • 3

      Rev the motorcycle engine to 3300 rpm. The multimeter should read between 14.3-14.7 volts. If it is outside of this range, the regulator is bad and must be replaced.

Tips & Warnings

  • Consider testing the stator/rotor and the battery at the same time as you are testing the voltage regulator.

  • Always use caution when working around electricity. Remove watches and rings to help avoid electrical shock.

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