Jackmark will be closed for Christmas from 12:00 PM on Wednesday, 24th December 2025, and will reopen at 8 AM on Monday, 5th January 2026. We want to take this opportunity to thank you for your continued support and loyalty throughout the year. We wish all our customers, both old and new, a Merry Christmas and a Happy New Year!

Pneumatic test leads attached to an engine and wall sockets in a factory

Supplier Assurance

Connect with Jackmark Engineering Ltd

Tier 1 suppliers to the Automotive Industry for over 40 years

Black connector being inserted into a white test tile

Bespoke Products

Test Equipment for Every Industry

Wire Harness, Internal Combustion Engines & EV Test Specialists

Five red rugged connectors with test leads on a schematic background

Industrial Environments

We design & manufacture
ruggedised connectors

Our products are typically used in harsh environments

Variety of test probe tips on a grey background

Aftersales Service & Support

Technical Advice, On-Site Support & Supplying Consumables

Ensuring your test equipment lasts the product lifecycle

Grey connector being measured with calipers on a schematic background

Engineering Partners

Project Management, In-house design, Manufacture & Validation

All products are supplied with extensive technical documentation

Globe with blue connections being made from the United Kingdom to other countries

Global Presence

Our products are used daily at major OEMs

Reliable, secure & live tracking of all goods shipped

Specialists in the Design & Manufacture of Engine & Wiring Harness Test Equipment

Welcome to Jackmark Engineering Ltd, suppliers of bespoke, high quality rugged test connectors, test lead assemblies, SWDL stations & functional check equipment

Ruggedised Test Leads

Worldwide suppliers & industry experts in the design & manufacture of industrial grade test leads

Wiring Harness Test

In-House designed modular test connectors specifically focused on the extensive requirements of automotive wiring loom testing

Software Download Stations

Bespoke single or multiple tray software download stations for ECM data transfer & validation

Precision CNC Machining

We provide CNC milling & turning of prototype & production parts machined from engineering plastics and non-ferrous materials

Proud to be partnering with

Latest from Jackmark

Jackmark Engineering celebrates 40 years of excellence and innovation in the automotive industry

2025-02-07

A Stoke-on-Trent family business that has been driving innovation in the automotive industry for four decades is celebrating its 40th anniversary with ambitious plans for future growth. Founded in 1984 by the late Peter David Jackson, Jackmark Engineering has become a world leader in the design and manufacture of bespoke, …

Jackmark manufactures High Voltage Electric Vehicle (HVEV) test connectors and lead assemblies

2024-01-16

Jackmark manufactures robust High Voltage Electric Vehicle (HVEV) test connectors and lead assemblies, designed specifically for the automotive industry. As the demand for electric vehicles …

Cheadle SMU Under 12's Reds Football Team

2023-09-18

Jackmark is a proud sponsor for the under 12's Cheadle SMU football team.