wikiHow is where trusted research and expert knowledge come together. How to Test an AC Clutch Coil by Jack Hathcoat . Check for continuity between C & R, C & S and R & S. Resistance should be less than 30ohms. But if you can, find a scrap AC unit at your environment and grab a compressor plug, then strip the 3 wire ends. So if your AC isn’t working, there’s a good chance that a faulty compressor could be the problem. It will say 0.00. When an electric motor fails to start, runs intermittently, runs hot, or continually trips its overcurrent device, there my be a variety of causes. Troubleshooting AC compressor wiring requires one. Now open the hood and find your AC compressor clutch. If the multimeter says you have blown the fuse, you just need to replace the fuse. Instead, the wire with the broken insulation is making electrical contact with the compressor casing or ground. Check the belt connected to the compressor for any tears, rips or notches on both the inner and outer sides of the belt. Note that there are only 3 motor winding failures, they include: Here is when one of the wires that makes up the motor windings is broken or separated. If the circuit breakers and the fuses are all operating properly, you’ll know a faulty compressor is probably the cause of your air conditioning problems. Now touch the metal end of the wire to the live compressor clutch wire. It is important that everyone knows how to use a multimeter to test a car battery. Video explaining how to test the compressor if you have a refrigerator that is not getting cold. Whenever your vehicle’s oil... For every one that drives cars daily, the suspension system is something they can’t scoff at. I would, however, proceed with the tests just to make sure that there isn’t something wrong with the fan motor because, if it is, it could make the new capacitor break down. Measuring ac voltage using your altimeter is not as hard as it sounds. 5 Factors to Consider Before Choosing a Mechanic For Your Car, Mercedes Maybach S600 – Inside the World Most Luxurious Vehicle. Using a ohm meter. Just turn off your vehicle. How to Test the Capacitor Using Analog Multimeter. I have about 50 AC repair articles on this site. if your compressor is off, it is going to assessment 12V. If you don’t test it, it will most probably leave you stranded. If your car's air conditioner (AC) stops blowing cold air and appears to only blow air, it may be low on Freon -- or it may require a new AC compressor. Most manufacturers recommend battery testing at least twice a year, whether done by a professional or by yourself. Now set your multimeter knob on connectivity text or Ohm. Step 8. 5. I hate to be the guy with dumb questions, but this is the only active subreddit that offers any kind of helpful auto repair advice. Then you can place the voltage tester on each of the three connections individually. To be able to avoid all the hassle of battery failure, the cost and your time, here are the things you need to know how to test a car battery with a multimeter yourself: Check all three wires with the test light; with the engine running, the wires should all be inactive. X Also, check to ensure that the belt is not overly smooth or shiny on the inside, as this is an indicator of a belt that has been stretched out. 'Well, we have something for you.We have started video tutorial series on 'How to use multimeter' in our channel 'Being Engineers' and in… Unplug any relay terminal wiring with the interior car A/C controls in the "off" position. Is there a way to test my A/C compressor using a multimeter? To measure resistance: 1.Insert test probes in the ? We use cookies to make wikiHow great. ... How to Test Your Car's AC Compressor. Flip the circuit to the off position to turn off the power. We’ll start with a multimeter continuity test. If you have a multimeter and know how to use it, locate the C, R and S terminals. And once you determine what the problem is, contact an automotive mechanic to get the problem solved. Check the fuse before testing. ... mostly in split unit AC the blue color wire is used for the run terminal. You can use this multimeter to not only test the voltage of your car battery but also carry out various repairs around the house. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Inspecting a Home AC Compressor for Damage, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/0c\/Check-an-AC-Compressor-Step-1.jpg\/v4-460px-Check-an-AC-Compressor-Step-1.jpg","bigUrl":"\/images\/thumb\/0\/0c\/Check-an-AC-Compressor-Step-1.jpg\/aid9606691-v4-728px-Check-an-AC-Compressor-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"