Auto Tester 12V-24V Audible Voltage, Polarity & Continuity

A practical auto tester for checking 12V-24V vehicle electrical systems with audible indication for quicker fault finding. Used for voltage, polarity and continuity testing, it also covers ignition pulse frequency and peak detection when tracing electrical problems on cars, vans and other 12 to 24 volt systems.

Useful for vehicle maintenance, servicing and general garage work, this tester helps when checking live feeds, earths, wiring runs and basic circuit condition. It suits mechanics, mobile technicians and DIY users working on cars and vans, especially when investigating starting issues, lighting faults, poor connections or intermittent electrical problems where a quick audible response can save time.

Built as a multi-function tester, it covers the main checks commonly needed during routine electrical diagnosis without switching between separate tools. The 12V-24V operating range makes it suitable for many common automotive and light commercial applications, while the audible function can be helpful when working in awkward positions or where watching the tester constantly is less convenient. For regular workshop use or home vehicle checks, it gives a straightforward way to confirm polarity, continuity and voltage before moving on to deeper repairs.

Auto tester specifications

• Voltage range: Suitable for 12V to 24V electrical systems.
• Functions: Checks voltage, polarity and continuity in one tester.
• Ignition check: Includes ignition pulse frequency testing for electrical fault tracing.
• Detection: Peak detection adds another useful check when diagnosing circuit behaviour.
• Use: Audible operation can help with quicker testing during servicing and repair work.
• Display: LCD.
• Suitable for: Petrol and diesel engines.

A practical choice for regular vehicle electrical checks and fault finding.