If you are working on the construction site of a new building or just remodeling your current house, you will want to use a circuit tester. A circuit tester will check the outlets in the building to see if they are receiving any sort of electrical flow. This is good knowledge to have because you will want to make sure all the outlets are working properly before you send the electricians home. more »

If you are performing home electrical work or are just curious whether a particular circuit is working, you may want to use an analog circuit tester. Analog circuit testers come in a wide variety of different models, some of which just use a light bulb to indicate the circuit is working, while others have a non digital display showing the actual voltage being given off. more »

If you are working with Solar and Wind systems you will need a circuit tester to make sure you get everything wired up correctly. You Can make one quickly and easily for less than $5 from parts bought at Radio Shack or any other electronics style store more »

To troubleshoot a fuel pump relay, start by pulling the relay out of its socket. Use a circuit tester and check the pins in the socket for power with the ignition key off. There should be one pin that has power direct from the battery. If not, check the fuse and make sure that there is power to the fuse. If not, look for the main wire in the fuse block to be loose or open to the fuse. If the fuse is okay and the relay has power to the one pin, turn the ignition key on. more »

Installing a hanging pendant light outdoors can bring old-world charm to your home, especially when used on a front porch. Stylish and inexpensive, they are simple to install as long as you follow some safety precautions. First, make sure you have a ladder, screwdriver, electrical wire nuts, and a circuit tester. Next, turn off the power to the house. Make sure that no one who is still in the home turns the power back on while you are working. more »

Heavy equipment operators work outdoors in all types of weather conditions. The work requires a wide variety of tools. From hammers, pliers and sockets to more complex tools like circuit testers and calipers, you have to have a comprehensive set of tools to get the job done. more »

Check the fuses for the blower motor and the relay. Make sure that the fuses are not blown. Check the blower motor and the relay to be sure they have power. Start the car and with the circuit tester check across the fuse for power. Now remove the relay and make sure that there is power to two terminals in the relay's female terminals. With the heater turned on, put the relay back in slowly and listen for it to click, indicating that it was actuated. If it does not click and two terminals have power, replace the relay. Turn off the ignition. more »

When a Honda Civic air-conditioning system (A/C) is being diagnosed, it must have Freon in the system. If the system has sprung a leak somewhere and the Freon is gone, it is no longer an active system that can be checked. A leak would have to be repaired before further diagnosis can continue. Freon can't be released into the atmosphere and must be reclaimed in a machine and reused. There is a major fine for releasing it into the air. For the purpose of this procedure, a circuit tester and a set of air-conditioning gauges will be needed. more »

The blower motor on most vehicles is under the passenger side of the dash, in the area of the glove compartment. The blower motors speeds are controlled by a blower motor resister located in the immediate proximity of the blower motor. It is usually just to the left of the motor. It can be identified by its shape and plug. It is a flat plate about 1 inch by 2 inches. It has a plug with at least five to six wires. This is usually, but not always, the reason for a blower motor failure to operate. The blower motor should be checked first for power before replacing (use a circuit tester). If there is no power, the problem is elsewhere. more »