Actron CP7677 AutoTroubleShooter - Digital Multimeter and Engine Analyzer for Automotive Professionals, Orange

Going on 9+ years with this multi-meter and still works as advertised for me . I've only used the resistance (Ohms) and voltage (AC and DC) settings, but always seems consistently accurate. Haven't seen any extreme, over the top readings that would make me question accuracy or reliability of any measurements taken. I did notice the digital LED readings fading at a certain point and I thought I had a dead battery problem. Changed the battery out but had same issue with the LED not as bright as before and sometimes fading out. I opened up the battery compartment area, cleaned some contacts (behind switch) and used some dielectric grease for the battery and switch contacts. The digital LED brightness returned and have had no problems whatsoever since then. Crossing my fingers I have at least a couple more years of use with my Actron. I did pick up another multi-meter recently as a backup AstroAI Digital Multimeter with Ohm Volt Amp and Diode Voltage Tester Meter on Amazon which had good reviews and very good price.

Funciona bien

It is hard to find a old school auto meater with DWELL FUNCTIONS. works great and rpm and all the other functions

La Precisión al medir es muy buena

Accuracy, multifaceted, experience and familiarity with the instrument.It has been around for a long time and has proven itself to be reliable tool over the years.Most customers with car experience loved this product.Not sure why it has been removed from our local autoparts store.

I actually bought mine last July, and didn't get a chance to write a review until now. Right out of the box, without the probes attached to anything, the unit gave me very weird readings. It would display random numbers and constantly jump around, along with a warning message telling me to install the probes, even though they were already plugged in. Messed around for 20 minutes trying to test the tester (!), and it wouldn't take any readings in any mode, or recognize the testing leads, even if they were definitly making contact. Of course, I at first suspected that it suffered from a terminal case of being "Chinese junk manufactured from toxic garbage by slave labor." But just as I was about to submit an Amazon review complaining about having wasted $50 and half an hour of my time (without even beginning to fix the car), I placed the probes on my fingertips and had second thoughts.This thing was reading that I was producing pulses of current up to 70 amps! Of course it was unable to take a reading, it was simply confused by being in the presence of the mighty ELECTRO!Yeah. So I tested my current and voltage a few times, and according to the meter, I was pulsing something like a 100 volts at 75 amps (seriously, not kidding). So I thought to myself, "how can I use my amazing powers for the betterment of my fellow man." Then I thought about my income tax bill this year, and I thought, "how can I use these powers to make daddy some money." Of course, I'm no fool, so I first tested my powers first on the dog, who was immediately stunned when I touched him. He's 90 lbs and fell right asleep when I placed my hand on his head, so my powers checked out and I was good to go.I'd like to say it took an actual superhero to stop my cunning plan, but in fact, it was really just two overweight security guys out in front of the Federal Reserve vault in Lower Manhattan. Yup, I laid my ELECTRO HANDS! on one of them (while of course, proclaiming that I was applying "ELECTRO HANDS!"), but instead of being stunned or knocked out, he tased me. I came to about halfway through the beating, and I swear that one of them had a camera phone out and was begging me to say "ELECTRO HANDS!" again, but the doctors convinced me that was just a side effect of being tased multiple times and the skull injuries I sustained while unconsciously resisting arrest. And no, it is not ironic that they tased me. That's a standard police practice. Anywho, I vowed that when I got out of the hospital, I would write a review on this faulty meter, and issue a warning to those of you who would otherwise follow me down the dark path I found myself on. Be cool, stay in school. And don't believe what a volt meter produced by a starving child in China for $.015 cents tells you about your body's ability to shock others into submission.(Or just buy a taser instead. Those things work wicked good.)

I've been having issues with my alternator lately not charging my battery. The alternator is just a year old, and my battery is 4 years old. Thought it might be a bad voltage meter. I finally decided to view digital multimeter and analyzers at Amazon. I read the reviews on this particular model and found it quite favorable. I received it very quickly and gave it a try. Come to find out the alternator wasn't charging the battery. This item helped me out a lot. My mechanic checked it out and told me it was a very good investment. I would highly recommend this product for their car or home use.

After a trying a few products that attempted to show engine rpm, I decided to go try this meter. I was able to set the engine rpm as per the book (tuning the carburetor) and the dwell angle. Took me all of 15 minutes. Great multimeter, lots of function for the money.