Parasitic Draw Tester – Car Battery Leakage Detector
Parasitic Draw Tester – Car Battery Leakage Detector
Quickly Find the Source of Car Battery Drain
Stop guessing why your battery keeps going dead overnight. The Parasitic Draw Tester is a multi-functional automotive circuit tester engineered to detect and pinpoint the exact source of battery current leakage in any 12V or 24V electrical system — without disconnecting the vehicle's battery or resetting the ECU.
Why You Need This Tool
Unexplained battery drain is one of the most frustrating automotive mysteries. Whether it's a faulty glove box light left on, an aftermarket alarm drawing power, or a malfunctioning relay, this tester makes it fast and simple to locate the problem circuit. No wire-piercing, no ECU resets, no lost radio codes or anti-theft lockouts — just clean, accurate readings every time.
Key Features
- Non-Intrusive Testing: Innovative design lets you track down battery drain without disconnecting the vehicle's electrical system, preventing computer (ECU) resets and anti-theft lockouts.
- Universal Compatibility: Suitable for all 12V and 24V electrical systems — cars, SUVs, trucks, motorcycles, and RVs.
- Fuse Box Ready: Comes with standard and mini fuse adapters so you can insert the tester directly into the fuse box for immediate, accurate readings.
- High Accuracy: ±1.5% measurement accuracy ensures reliable, professional-grade diagnostics every time.
- Durable ABS Construction: Compact (5 × 3.5 cm / 1.97 × 1.38 in), lightweight, and built to handle regular workshop use.
- For Pros & DIYers: Perfect for professional mechanics and home garage enthusiasts who want fast, hassle-free diagnostics.
Specifications
- Material: ABS
- Size: 5 × 3.5 cm (1.97 × 1.38 in)
- Measurement Accuracy: ±1.5%
- Compatible Systems: 12V & 24V
- Batteries Included: No
- Country of Origin: Made in Mainland China
Package Contents
- 1 × Parasitic Draw / Battery Leakage Circuit Tester
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Learn more: FuelEconomy.gov on vehicle maintenance
Frequently Asked Questions
Q: Will the parasitic draw tester reset my car's ECU or radio codes during testing?
A: No. This battery leakage tester is specifically designed to allow testing without disconnecting the vehicle's battery, so your ECU settings, radio codes, and anti-theft system remain completely intact throughout the diagnostic process.
Q: What vehicles is this car battery drain tester compatible with?
A: The tester is compatible with all 12V and 24V vehicle electrical systems, including cars, SUVs, trucks, motorcycles, and RVs. If your vehicle uses a standard fuse box, you can use this tester directly with the included fuse adapters.
Q: Do I need to pierce any wires to use this circuit tester?
A: No wire-piercing is needed. The tester inserts directly into the fuse box using the included standard and mini fuse adapters, keeping your vehicle's wiring fully intact.
Q: How accurate are the readings from this parasitic draw detector?
A: The tester provides measurements with ±1.5% accuracy, delivering professional-grade results suitable for both workshop mechanics and experienced DIY enthusiasts.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.