This 9038A 6-Piece Relay Bypass Switch Kit is a professional-grade diagnostic solution designed for 12V automotive electrical systems. Equipped with an amplifier loop, it functions as both a relay bypass switch and a diagnostic scan tool, enabling efficient testing and troubleshooting of fuel pumps, cooling fans, window motors, headlights, and air conditioning compressors.
The kit allows independent control of relay circuits, bypassing the vehicle's key-on/off system to directly activate DC motors or fuel pumps. This eliminates the need for repetitive key cycling during testing, saving significant time for technicians. The built-in amplification loop supports real-time current monitoring when used with amp clamps or oscilloscopes, helping detect faulty motors or relays by analyzing current draw patterns.
Constructed with high-quality flame-retardant plastic and silver-plated contacts, each switch delivers reliable performance with a 20A continuous and 30A surge current rating (12V). The dustproof and waterproof housing ensures durability in harsh underhood environments.
Plug-and-play design ensures effortless installation—just insert the switch into the relay socket to gain immediate control. Compatible with most domestic, Japanese, Korean, and German vehicles, this kit is a must-have for DIY enthusiasts and professional mechanics alike, streamlining electrical diagnostics and repairs.