Northern Tool Ratings and Reviews
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Automotive Diagnostics Reviews

Overall Rating:5 out of 5 stars.
"Good tool for the money. It would be nice if it came with its own carrying case."... (read full reviews)
Overall Rating:5 out of 5 stars.
"I was testing a buddy's battery and a mobile mec. was laughing at my little "toy tester" he got his $389 tester out that has heat coils and produces heat and a SPARK if not a good connection. His said"... (read full reviews)
Overall Rating:5 out of 5 stars.
"This item worked as expected and was as good as any I've used. A good tool for the price. The case made for convenient storage."... (read full reviews)
Overall Rating:5 out of 5 stars.
"Very durable, easy to use, easy to read Unit. Working as a Project Manager for an Internationally recognized Company, it is essential that pre and post construction light level readings not only be"... (read full reviews)
Overall Rating:5 out of 5 stars.
"fabulous!, easy to use, and you don't need to be a rocket scientist to use..."... (read full reviews)
Overall Rating:5 out of 5 stars.
"Correct coolant mixtures are important to me for boil-over protection when I'm wheeling my jeep in the Southwest desert's 100+ degree F. temperatures. Old fashion hygrometers are not that accurate"... (read full reviews)
Overall Rating:5 out of 5 stars.
"Excellent tools for the money. I bought 5 units"... (read full reviews)
Overall Rating:4.8 out of 5 stars.
"With this Mechanics Stethoscope I was able to find the vacume hose leak and fix the CHECK ENGINE light."... (read full reviews)
Overall Rating:4.7 out of 5 stars.
"Thi is an excellent kit for testing light switches -wiring-heat temperatur-etc... - can be used on appliances-air conditioner. This kit has been both accurate and depedable for me .The literature with"... (read full reviews)
Overall Rating:4.6 out of 5 stars.
"This is the perfect tester to have when you have a boat, truck, car, and everything else that has a battery. Works great for testing batteries while they are still in the boat vs. having to pull them"... (read full reviews)
Overall Rating:4.5 out of 5 stars.
"It.s compact size makes it easy to hold an put in your shirt pocket, and has good duriblity. Not big and bulky like other models."... (read full reviews)
Overall Rating:4.1 out of 5 stars.
"Ordered this to help out with engine breakin. Its well constructed and does the job its intended for. I needed a fuel tank for a mini bike project I'm working on and it fit the bike perfect, much to"... (read full reviews)
Overall Rating:4 out of 5 stars.
"Pros: Cheap, solid run stand for multiple engines Cons: No wires for gauges and difficult instructions for setup. I initially had problems with shipping. I had to send the package back twice before"... (read full reviews)
Overall Rating:4 out of 5 stars.
"This mirror was great until I broke it(its glass with an aluminum backing around it). It helped me preform several automotive & some tight plumbing repairs as well.. It would take some patience to"... (read full reviews)
Overall Rating:4 out of 5 stars.
"I carry this little testor in my tool box and a have used to test batteries and also to test alternator/generator function in everything from my cars and truck to my boat and tractor. It has never let"... (read full reviews)
Overall Rating:3.3 out of 5 stars.
"We have 3 vehicles and i wanted save money on our auto repairs so i brough my code reader at a great price. So whenever a check engine light comes this tool comes in handy and saves our family the"... (read full reviews)
Overall Rating:3 out of 5 stars.
"For the price, this is a good basic tester. Yes, the instructions are poorly written and not very helpful, but useful none the less. With a little internet research (YouTube and the like), you can get"... (read full reviews)
Overall Rating:3 out of 5 stars.
"I have used this tester on 5V, 6V, and 12 Volt automotive electrical systems with no complaints. It seems solid and well built, especially compared to other testers I have had in the same price"... (read full reviews)
Overall Rating:3 out of 5 stars.
"The display is small but adequate. Simple screw holes are provided for mounting. It comes with a tiny magnet in an envelope. You're supposed to glue the magnet to the shaft of what you are metering."... (read full reviews)
Overall Rating:3 out of 5 stars.
"these are great, i use them everyday in the shop.----------"... (read full reviews)