How do I know if my voltage regulator is bad on my Harley?

How do I know if my voltage regulator is bad on my Harley?

You’ll note signs right away like poor starts, fluctuating meter readings, and dimmed headlights. around 13 volts, the bike will start to drain the battery. When this happens, it’s only a matter of time before the engine stops completely.

How do you test a Harley Davidson regulator?

Test the Diode Function of the Voltage Regulator

  1. Change the setting on the multimeter to Diode.
  2. Clamp the multimeter positive lead on the AC output wire and the negative lead on the battery charge wire.
  3. Reverse the leads by clamping the negative lead on the AC output and the positive lead on the battery charge wire.

How do you bench test a Harley voltage regulator?

First, check DC voltage at the battery, using a multimeter. It should be around 14 volts DC with the bike running. Next, turn the bike off and unplug the regulator from where it goes into the case. Set your meter to ohms (lowest scale) and check across the 2 pins coming out of the case.

Can a bad voltage regulator drain your battery?

The diodes are part of the rectifier assembly that converts the alternator’s AC output to DC. A leaky diode also can allow current to drain out of the battery through the alternator when the vehicle is not being driven. A faulty voltage regulator can also cause charging problems.

Where is a voltage regulator located?

The voltage regulator is usually found inside or on the back of the alternator case. Increasingly, though, late-model vehicle have the engine control module (ECM) regulating alternator voltage output through a special circuit.

Can you fix a voltage regulator?

The regulator may be fixed by two screws, or by one screw and locating slots: note how these slots fit so that you can install the new unit correctly. Take care not to drop any screws or washers. Some internal regulators have a field connecting link from a terminal to the regulator body.

Can I drive with a bad voltage regulator?

A damaged or failed voltage regulator can rapidly diminish the alternator’s ability to cycle power from the battery. This may cause the vehicle to experience dimming or pulsating external systems, such as headlights and dashboard elements.

What does the voltage regulator do?

A voltage regulator generates a fixed output voltage of a preset magnitude that remains constant regardless of changes to its input voltage or load conditions. There are two types of voltage regulators: linear and switching.

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