Auto electrical wiring tools for commercial vehicle technicians
Electrical fault-finding and wiring repair on commercial vehicles requires a different set of tools to most other workshop disciplines. A reliable crimping tool that produces consistent, gas-tight crimps is the most important item; a poor crimp is a common source of intermittent faults that are difficult to diagnose and costly in technician time. Quality ratchet crimping tools with interchangeable jaws cover the range of terminal sizes encountered across HGV harnesses.
Terminal removal tools allow connectors to be dismantled cleanly without damaging the terminal housing, which is essential when replacing individual pins rather than an entire connector assembly. Wire strippers with calibrated stops for different wire gauges produce clean, consistent strips without nicking the conductor. Circuit testers and test leads suitable for 24V systems, together with probe back-pins for testing at connectors without breaking into the harness, complete the diagnostic toolkit.
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Frequently asked questions
What type of crimping tool is best for HGV wiring repairs?
A ratchet crimping tool with interchangeable die sets is the best choice for professional HGV wiring work. The ratchet mechanism ensures the crimp is completed fully before the tool releases, which prevents partial crimps. Die sets covering 0.5-6mm insulated terminals cover the range of wire gauges used in most truck harness applications. Open-barrel and sealed connector die sets are available for specific connector types.
Do I need special tools for working on CAN bus wiring on modern trucks?
CAN bus wiring on modern trucks uses twisted pair cables at specific wire gauge and twist rates to maintain signal integrity. Standard cutting and stripping tools are fine, but maintaining the correct twist rate when splicing is important to avoid signal degradation. For diagnostic work on CAN bus systems, a digital oscilloscope or dedicated CAN bus analyser provides more information than a basic circuit tester.
Are 24V circuit testers available for HGV use?
Yes. Standard 12V test lights will work on 24V systems as a continuity and live feed indicator but the bulb may burn out more quickly than intended. Purpose-made 6-24V test lights or digital test lights are more appropriate for HGV use. For voltage-sensitive diagnostics, a multimeter rated to the system voltage is a more accurate alternative to a test light.
