How to use a Rolson 3-in-1 Ac/dc Voltage Tester.. Instructions

There is also a voltage regulator. old cars have mechanical, but for more than 20 years they are electronic.
Test the whole charging circuit, the dynamo, AC or DC. if it is a modern AC, test the rectifiers and voltage regulator.

possible blown fusible resistor (check for open or very high resistance - should be about 1kOhm) - first big resistor in Voltgae terminal circuit

input protection circuit is blown , see if you can find fusible resistor and check for open circuit (should be 1kOhm) - big resistor on the right straight from the Volts input

Voltage testers and volt meters are two different things. A meter will provide a an indication of the exact voltage and type AC or DC. A tester on the other hand simply provides an indication of presence of power with little to no indication of how much or type.

AC power is what is provided by most power companies in the world. DC is a type of power provided by batteries and DC power supplies. If your tester or meter has provisions to check for AC and DC, you should check for BOTH. If AC power is present and you are have set your meter to test for DC power, your meter will indicate 0 volts. You can see this can be a dangerous condition. Most simple testers will not care if AC or DC power is being tested and the types that use neon lamps will usually glow differently for AC and DC power.

When setting up for testing voltage, you must test across the power source (or in "parallel") or load (such as a light bulb), as opposed to "in series" with the power source. Across would be from the + to - post of a battery, into the slots of an outlet, etc. "In series" is when the tester would be completing a circuit - such as testing across an open switch.

First, check the meter's operation by testing a known good power source by following the next steps. Set the meter for the type power to be tested. Choose AC if unsure. Next, set the meter for the highest voltage range supported. Make sure this range is higher than the expected voltage, otherwise damage to the meter may result. Connect the probes to the power source. Read the meter. If the meter moved only slightly, adjust the range of the meter to the next lower value. You can keep adjusting downward as needed to get the most precise reading possible - but do not set the range to a value less than the voltage present. A 0-300 volt scale is the lowest to measure a 240 volt outlet - switching to a 0 - 150 volt scale will damage the meter. The 0 - 150 volt scale would be fine for measuring 120 volt outlets.

If the meter did not move, change the type from AC to DC. and repeat. If it still does not work, the meter is not working correctly (if testing a know good source) or there is no power present (if the meter worked on a known good power source).

Good luck!

If you are testing A.C. volts in most cases polararity really doesn't matter much. For voltage test put one probe on white wire and the other on black. If you are testing D.C. voltage then you need to observe polararity and go black to ground - and red to positive +. Hope this helps you. Thanks

HOLD ON!!! The Klein 69127 is an automotive tester to be used for voltages between 6V-24V, AC or DC. The higher voltage in your home could possibly damage the unit as well as yourself. It would be safer for you to use the non contact tester to verify voltage Klien NCVT-1

No, you can't use an Ideal 61-065 tester to test a car battery. It is only for 100 volts AC/DC to 600 volts AC/DC.
A meter like this will work:
http://www.a1components.com/itemdisplayn.aspx?item=11307

Actually, the easiest way to test a car battery without a meter is to turn on the lights. If the lights shine bright like they are supposed too for a minute or so, the battery is maintaining the correct voltage.

My friend ... here is the answer:

Description:

• WIGGLY VOLTAGE TESTER
• Solenoid type tester polarity
• indicator
• 120/240/600 VAC; 50/60 HZ
• Lifetime warranty

Your 12 volt battery is DC voltage as well as far below the voltage testing threshold of 120 volts.

Thank you for your interest n FixYa.com

Usually, It can measure AC and DC voltage, DC current, and resistance. It also checks diodes, verifies continuity, and tests 1.5 V and 9 V batteries

To measure the voltage at an electrical outlet requires the use of a multimeter. Always test your test equipment for proper operation before use. Set the multimeter to AC voltage. The markings may appear as VAC, AC V, or a V beneath a wavy line. Choose the AC voltage closest to the voltage you will measure. Standard current in home and businesses in the USA is in the range of 110 to 120 volts. Some circuits used for equipment such as dryers, air conditioners, electric stoves, ovens and other large equipment may use voltage in the range of 220 to 240 volts. These heavy-duty circuits can be identified by their non-standard outlet plugs. While grasping the insulated portion of the probes (never touch the metal conductor during testing) place one probe into each of the two terminals. The multimeter will display the voltage. Carefully remove the probes, being careful not to touch the metal part of the probes to anything or each other. The voltage should typically test in the range of 108 to 121 volts for most circuits. If voltage is higher or lower, professional electrical service may be required.