ATS E5A High Voltage Cable Tester

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Part# 12-01016
MFR Model# E5A


The Model E5 High Voltage Cable Tester tests Hi-Voltage aircraft engine ignition cables quickly and accurately. And it's incredibly easy to use: simply connect the three wires, push the test button and check the test window. That's all there is to it. By simulating the magneto's high output voltage, the E5 instantly identifies both good and defective cables. And it operates on either 12 or 24 volts,D.C.

The E5 eliminates guess work, saves valuable time, is equipped with an audio high voltage indicator to ensure safety and is 100% dependable. And no other high quality cable tester is as attractively priced.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • Automatically works with Both 12 & 24 Volt Aircraft Battery Systems
  • All Solid State Circuitry
  • Test Cables at up to 20,000 Volts
  • Produces Voltage Pulses Similar to Magneto's Output for Realistic Testing.
  • Heavy-Duty Lead Wires


Hugo H Verified Purchase


April 28, 2022

The device is convenient and easy to use. With the help of it, I found faulty high-voltage wires. Glad to buy. Thanks!

Tatlyev A
December 1, 2021

I have a mobile aircraft service van and I bought the E5a High Voltage cable tester. Was in my vehicle’s toolbox for ma ny months. The first time I tried to use it did not work. I can hear loose parts inside the unit. After opening it I found the plastic, holding the contact points came off. I put it back and I noticed the 2Amp fuse was blown do to the points not being in place. Could the vibration from my van got those screws loose or were no properly secure in the first place.

Phillips I
November 30, 2021

A must have for any mechanic, easy to use. great quality

Dan B Verified Purchase


November 5, 2021

Michael C
March 5, 2017

Very easy and simple to use. No need to worry about switching from 12 to 24 volts as it does it automatically

Tim H Verified Purchase


October 29, 2021

Just got one today! While it does function, mine has the added feature of zapping the user through its conductive metal housing.

Numb F
April 19, 2022


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Where can I find a copy of the user manual and insructions sheet for the E5 High Voltage Cable Tester?

We have just added the instructions as a PDF on this web page. It is now located in the "Documents" tab and available for download.

Q: Can I hook this High Voltage Cable Tester E5 up to a external battery and ground the (-) side of the battery to the engine if using on a non-power aircraft? Cub, Champ etc.

The power source does not have to be the aircraft battery. 12/24 volts are required to test, but it can be from an alternate power source.

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