Auto Electrical Repair Tool

On this page you’ll find tools to help make electrical fault finding and wiring repairs easier.

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The Dealer Alternative to Auto Parts

Parts Geek offer a professional service with a massive parts list and great discounts, they also have an easy to use no nonsense part checker right there in the middle of the home page, can’t miss.


Chasing electrical gremlins is easy when you have the correct tools. The number one tool is professional wiring diagrams complete with wiring colors, routing, terminal connector locations, control module pin outs etc.

I use eManualOnline because their wiring diagrams and workshop manuals are pro grade, instant download, don’t cost a ton and they’re yours to keep. Nice!

The NOCO jump starter pack is a serious tool, don’t let its size fool you. This little guy fights way above its weight. Capable of starting a diesel truck engine and yet small enough to fit in your glove box.

It features smart design and technology, it won’t allow you connect it backways and it features a no spark technology, meaning it doesn’t arc when connected to the battery, nice!

It’s powered by latest technology lithium battery. But it’s got a few more tricks, it’s a fast charger too (2 hours), that means you can use it to charge your car, truck, boat, mower, snow blower battery as well as jump start them.

Other features include – a charge port for charging your phone or iPad, comes with a eight mode hand lamp (500 lumens),12v 15amp port to power air pumps or whatever.

I’m a fan.

The NOCO genius battery charger is what’s known as a smart charger also know as a battery maintainer or trickle charger. They are smart because they detect battery state of charge and automatically turn off and on as needed.

The genius will work on 6 or 12 volt, regular wet battery (mower battery) Modern vehicle batteries (AGM) and Lithium too.

Unlike normal chargers, the NOCO genius has a neat force charge function, saves the old two battery hook up hack, I like!

This makes this little charger ideal for many purposes. Hook up this little guy to a your modern car battery, lawn mower battery, classic car, motorhome, boat etc. safely over winter and it will keep your batteries in top condition.

A Power probe is an excellent tool to have around. Great for testing circuits, relays, fuses, checking battery voltage, checking alternator output, checking ground, volt drop testing. I’ve had a power probe since forever and it’s still going strong.

Inexpensive test light, lights red for power and green for ground. Sharp probe for piercing wiring, where back probing isn’t possible.

The Autel MaxiCOM is a shop level tool. It is capable of reading, clearing fault codes, coding a new battery, placing EPB module in service mode and calibration after the repair. It is also capable of activating ABS modulator solenoids when performing a full brake bleed procedure.

Armed with this you’ll be fit to read any code on any control module – engine, air bags, ABS, transmission etc. It’s bidirectional so you’ll also be able to activate components through the tool which is excellent for diagnosing component or switch issues.

It resets service messages, calibrates systems, codes injectors, runs DPF regen on diesel vehicles and much much more. You won’t need another scanner.

Fluke DVOM (Digital Volt Ohm Meter) also known as Multimeters or Volt meters are leaders in the game and this one is a surprisingly good price. Fluke is a pro tool and will acutely measure volt drops and resistance, both critical measurements for fault finding components or circuits and increasingly so as the world of transport turns electric.

Cartman battery and alternator tester. This inexpensive tool makes testing your vehicles battery and alternator really simple. Connect it up, red to positive and black to negative side of the battery and read the traffic light display. Starting and running the vehicle will test the alternator.

Fast, simple and inexpensive relay tester. Tests four and five pin relays, displays green light for good and red for fail.

Schumacher OBD-L Memory Saver or KAM tool. Important to fit the memory tool before disconnecting the battery. Modern cars don’t like being without power. The Schumacher is easy to use with it’s 3 step guided procedure.

Power probe soldering iron kit. Butane powered for instant heat, who has time to wait for a soldering iron to heat. This kit comes with a selection of tips to suit the particular job at hand.

Klein wire strippers is just nice tool to use, makes life a ton easier especially when you’re under a dash board trying to make repairs. Not an essential tool, but if you do a lot of wiring you’ll be glad you invested.

I can’t work without a good light, if I don’t have good light I find the job goes down hill quickly. Enuotek build this tough mechanics light, I’ve had several of these lamps, not because they break but because I lose them.

I’ve bounced mine on the ground so many times, and it survived. They are a real MacGyver of a lamp, magnet, hooks, led area light and spot light.