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How to Fitting A New Voltage Regulator

Here you can get How to Fitting A New Voltage Regulator.

When you have tested the charging system of a car fitted with an alternator , and the checks in how to test a automobile battery point to a fault within the transformer, make sure that you need to replace it. The fault could also be elsewhere. If the simple tests described here don’t work, take the car to an auto-electrician; alternators fitted to modern cars are easily damaged.

Before doing any work on an alternator system aside from testing, disconnect both terminals of the battery. Incorrect charging or no output could also be thanks to a badly earthed regulator. confirm that the connections are clean and tight. The unit may be earthed through its mountings or by a separate lead.

Undercharging may be caused by faulty alternator brushes and slip rings (See Renewing alternator brushes ), as well as by a faulty regulator. A simple thanks to check the alternator is to start out the engine and connect a voltmeter across the battery terminals. If it registers battery voltage only, the fault is within the alternator or its wiring, or during a field isolating relay if fitted. If it registers an excessive charge (15 volts or more) the regulator is faulty and you ought to replace it.

Replacing a Lucas ACR internal regulator

With the battery disconnected, remove the rear cover of the alternator. On most cars you want to take the alternator off to reach it (See Testing an alternator and checking output ). Unfasten the leads there are two, three or four and a metal connecting tag – noting where they fit. The regulator could also be fixed by two screws, or by one screw and locating slots: note how these slots fit in order that you’ll install the new unit correctly. lookout to not drop any screws or washers.

Some internal regulators have a field connecting link from a terminal to the regulator body. The link protects the alternator from the battery when the ignition is switched off. you’ll got to slacken the link screw and move the link aside. Note the tiny plastic spacer.

The new unit might not be identical in all its respects to the old one – for example, it’s going to have more or fewer connecting wires. Follow the maker’s instructions carefully; they’re going to tell you ways to attach the unit to various types of alternators. Reassemble the alternator, reconnect the battery, start the engine and test (See the way to test a automobile battery ).

Replacing a separate regulator

Replacing a separate regulator outside the alternator is straightforward, whether it’s a modern transistor type or one among the electromagnetic kind fitted to some imported cars. With the battery disconnected take the connections off the regulator. Label the results in avoid confusing them.

Remove the fixing screws and begin the regulator. Clean the world behind it to make sure an honest contact if the regulator is earthed through its mountings. Fit the new unit, reconnect the leads, then the battery. Start the engine and test the regulator.

Independent regulators

Although the trend is towards designing the electronic regulator into the alternator, some are still separate. An older car may have a dynamo rather than an alternator. A dynamo features a separate regulator, the control box (See Cleaning and replacing an impact box ), which has three electromagnetic switches for controlling the current , the voltage and for cutting out when necessary, to stop the battery from discharging through the dynamo.

Some alternators have separate electromagnetic regulators, and a few have a separate field isolating relay, an electromagnetic switch which protects the alternator when the ignition is switched off. Some cars have a separate control within the circuit for the red light on the control panel.

How to Change a Voltage Regulator

The voltage regulator in your automobile controls the voltage in your electrical system, maintaining a constant current to run the electrical and electronic accessories in your car. It maintains a constant voltage of between 13 to 15 volts, depending on your automobile. the extra voltage above your battery’s voltage, which is 12 volts, allows the battery to be recharged. There are two types of regulators, contained electronic regulators and get in touch with point regulators. Unless you’ve got a classic car, quite 25 years old, your regulator are going to be of the electronic variety and is either attached to your alternator or located remotely.

Step 1

Use a wrench to detach the cables from the battery. The battery is usually located under the hood, directly behind the grill of the car , on either the proper or left side. it’s two cables attached. Detach the positive cable first, it’ll be labeled with a “+” sign. Loosen the nut holding the cable by turning it counterclockwise. Remove the negative cable within the same way.

Step 2

Locate the voltage regulator. it’s either during a black plastic box on the rear of your alternator, which can be labeled on the belt diagram under the hood of your car or in line within the battery cable between the alternator and therefore the battery. Consult a repair manual for your make and model for more specifics.

Step 3

Position the new regulator over the old for remote regulators, inline with the battery cable and not attached to the alternator and unplug each cable from the old regulator and plug it into the new regulator. There could also be up to four cables, counting on the make and model. For cables attached with screws, loosen the screws by turning them counterclockwise with a screwdriver. Attach the cables by fitting them onto the corresponding screws on the new regulator. Tighten the screws with the screwdriver. For integrated regulators, those attached to the alternators, move on to subsequent step.

Step 4

Remove the screws or bolts holding the regulator to the car frame, or alternator, employing a wrench or screwdriver. the sort of mounting hardware depends on the car model. Position the new regulator, aligning it with the holes on the alternator or car frame. Install the mounting screws through the holes within the new regulator and tighten them, by turning them clockwise.

Replace the battery cables and tighten the cables with the wrench, ensuring to connect each cable to the contact you removed it from, positive to positive and negative to negative.

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