PARASITIC DRAW TEST SWITCH - OTC Tools and Equipment

The OTC Tools and Equipment J38758 Parasitic Draw Test Switch is a specialized diagnostic instrument designed for professional automotive and industrial technicians. This tool provides a safe and efficient method for isolating excessive current draws that lead to battery depletion, allowing for accurate amperage measurements without interrupting critical vehicle circuits or losing computer memory. It effectively functions as a parasitic draw test switch, enabling systematic identification of the source of electrical drains.

Key Features

• Accurate Parasitic Draw Measurement: Facilitates precise measurement of current draws by routing all current through an amp meter, connecting securely between the negative battery lead and the battery terminal for effective parasitic draw testing and diagnosis.
• Memory Preservation: Engineered to maintain vehicle computer memory, including ECU and radio presets, throughout the diagnostic process, eliminating the need for reprogramming after testing.
• Systematic Circuit Troubleshooting: Allows technicians to safely remove fuses one at a time while continuously monitoring the amp meter, enabling quick and efficient identification of the specific circuit responsible for the current draw.
• Broad Vehicle Compatibility: Works effectively on all GM vehicles and is compatible with any vehicle equipped with side- or top-post batteries, offering versatile application across various models.
• Durable Professional Construction: Manufactured with professional-grade quality and solid construction, ensuring reliability and longevity in demanding shop environments.

Applications

This OTC J38758 parasitic draw test switch is ideal for various diagnostic scenarios requiring accurate electrical system analysis, including:

• Pinpointing the source of mysterious battery drains that result in dead batteries.
• Troubleshooting complex electrical system issues in modern vehicles with sensitive electronic modules.
• Verifying repairs related to vehicle accessories and control modules that may remain active when the ignition is off.
• Performing routine electrical system health checks where disturbing vehicle electronics must be avoided.

Specifications

• Dimensions: 12.8 × 1.5 × 2 inches
• Weight: 0.7 lb