HD LOGIC PROBE CIRCUIT TESTER

The Bosch 3631 is a heavy-duty logic probe tester designed for a wide range of automotive electrical system diagnostics. It features a multi-functional design capable of testing voltages from 3 to 26 volts. Bright red and green LEDs provide clear interpretation of voltage signals, including ground, power, and frequency.

This tester can diagnose fuel injectors, solenoids, and detect the presence of serial data and tach reference signals. It also performs output tests on sensors such as MAF, Cam, Crank, and Hall Effect VRS. Its high impedance input ensures compatibility with sensitive computer circuits and sensors.