How To Load Test A Charging System

Turn on lights and blower fan. How do you check for not enough power coming from the charging system.

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It recharges the battery of your car to keep it working.

How to load test a charging system. How to test the charging system and alternator. Battery charger to be switched offload MCB in charger to be switched off. Perform instructions in Step 1 and Step 2.

Do just like you would do things when parking the car overnight. Set the load tester selector to the correct position using the manufacturers manual. Individual cell voltages to be recorded before the start of the test.

In order to check the charging system the use of Rotunda Alternator Regulator Battery and Starter Tester ARBST 010-00725 or equivalent tester is suggested. The reading of voltage should be between 141- 147 volts. Make sure all the lights and accessories are off.

Connect the voltmeter black lead to the positive battery post. Be sure to place headlamps on bright unless fog-lamps require lamps to be on dim. Test voltage regulator accuracy Over-Charging 1.

Turn the heater blower motor on high speed. Step 1 charge the batteries to full capacity either by driving or using a 120V battery charger. And retest the system.

The alternator also forces up the automobiles electric system during performance. To test the electrical system for unwanted loads draining power shut everything in the car off. Positive to positive and negative to negative.

With the load control OFF run the engine at 2000 rpm or specified test speed. Once the results for the Cranking Test are displayed press Enter. Use a shunt if the system you are testing draws more current than your meters DC amps rating.

Its clear that the alternator is an important part of a modern vehicles electrical and charging system. Remove the negative post wire and check current draw with all electrical loads off using a test light. Step 2 look at your dash locate the volt meter on the dash cut some duck tape to size and make sure you can never see it again its a lie stop using it.

Note the voltmeter reading and compare it to the manufacturers specifications. Hook around ALL positive or ALL negative battery cables 3. The alternator also powers up the cars electrical system during.

Regulator voltage test procedure is as follows. The generator is not designed to put out maximum power at idle. Why Test Your Alternator.

Measuring Charging System No-Load Voltage. Attach the positive and negative terminals of tester to battery. When less than 8 amps are entering the battery voltage should be more than 138 volts and less than 148 volts changes with temperature.

It there is no increase in voltage or voltage increase is above 25 volts perform load test. If your car has LED lights the tester may not detect that you turned on the lights. 2 Turn on ALL electrical accessories.

Simple Charging System Tests 1. Switch the tester to ammeter setting. Zero the amp probe 2.

Turn on the high beams for ten seconds to remove any surface charge. Place the voltmeter leads to the battery terminals. Youll want to see a reading of 138 to 145 volts to know that your stator and regulatorrectifier are operating properly and.

Also the total power to be dissipated in the load unit should be within the power rating of the battery load kit. 1 Run the engine at 2000 - 2500 RPM. Rev up the engine as instructed.

LOAD TEST The following tests are performed when the charging system is operating normally but the battery discharges either while the engine is running or while the engine is off. When performing charging system tests turn off all lamps and electrical components. Start the engine and have an assistant run at 2000 rpm.

Turn them off and wait. Accurately measure battery voltage 5. Run engine with all electric loads OFF 4.

ATurn OFF the ignition switch and connect a DMM set to measure DC amps as shown. Start your motor and bring the RPMs up to approximately 3000. So now lets check the power side of the charging circuit.

A slow charge is better then a fast charge. Set your voltmeter to 2 volts on the DC Volts scale. Connect the voltmeter red lead to the output battery post B on the back of the alternator.

Next measure system voltage output without current draw all accessories. Connect the current probe to B terminal of alternator. Loading of the battery to be started at the specified current value.

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