Product Overview The CNBJ-707 Automotive Relay Tester is a versatile diagnostic tool designed to quickly evaluate the condition and performance of automotive relays. It provides an accurate pass/fail indication, helping technicians identify faulty relays responsible for issues such as starting problems, lighting faults, fuel pump failures, and other electrical malfunctions. Compact and easy to use, the CNPJ-707 is ideal for workshops, mobile technicians, and DIY users. Key Features Relay Compatibility: Supports most 4-pin and 5-pin automotive relays. Accurate Testing: Identifies coil resistance, contact operation, and relay switching performance. Easy Operation: Simple plug-in testing with clear indicator lights for quick results. Portable Design: Compact, lightweight housing for convenient use in any workshop environment. Built-In Power Leads: Connects directly to the vehicle battery for stable testing power. Technical Specifications Supported Relays: 4-pin & 5-pin automotive relays (standard ISO types) Power Supply: 12V (via vehicle battery terminals) Indicators: LED status lights for relay operation and test results Test Functions: Coil activation, contact switching verification, load simulation Cable Length: Standard battery connection leads for flexible positioning Construction: Durable ABS housing with reinforced connector sockets Applications Engine start relays Fuel pump relays A/C and cooling fan relays Headlight and horn relays General automotive electrical diagnostics Why Choose the CNBJ-707? The CNBJ-707 allows fast and reliable relay diagnosis without guesswork. Its simple interface, universal compatibility, and dependable test output make it an essential tool for any automotive technician or workshop. Step-by-Step Operating Instructions Connect: Attach the red alligator clip to the battery positive ( ) and the black clip to the negative (–). The tester will light up Red to show it has power. Select: Check your relay. If it has 4 pins, set the toggle switch to “4 Pin.” If it has 5 pins, set it to “5 Pin.” Plug In: Insert the relay into the matching socket on the tester. Test: Press the “TEST” button. The device will check the pin layout and then rapidly cycle the relay 10 times. Observe: If the light stays Red, the relay is faulty. If it turns Green, the relay is good for use.
