Skip to content
Electronic Circuits

DIY Hobby projects, diagram, schematic

Electronic Circuits

DIY Hobby projects, diagram, schematic

12V Vehicle Electrical Wiring Tester Circuit

electronicecircuits, November 24, 2010August 15, 2023
12V Vehicle Electrical Wiring Tester

12V Vehicle Electrical Wiring Tester Circuit

This little tester is useful for checking vehicle electrical circuits. Two LEDs indicate whether one of the clips is connected to the positive supply line (red) or to ground (green).

PARTS LIST
R1150Ω
R2150Ω
D1Green LED
D2Red LED
D36.8V 1/4W Zener Diode
D56.8V 1/4W Zener Diode

The unit is powered by the vehicle battery. It is advisable to terminate the unit into  two insulated heavy-duty crocodile clips. These enable connection to be made directly to the battery or to terminals on the fuse box. It is also possible to terminate it into a suitable connector that fits into the cigarette lighter socket.

IF a sharp needle is soldered to test point, it is possible to check insulated wiring, but only those that carry 12V. Although the needle pierces the insulation, it does not damage it.

12V Vehicle Electrical Wiring Tester12V Car Electrical Wiring Tester

Please send your ideas, which are very important for our success…

Electronic Circuits Tester Circuits

Post navigation

Previous post
Next post

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

  • Diagrams
  • Privacy Policy
  • Software
  • Contact

Recent Posts

  • LM317 CONSTANT CURRENT CALCULATOR
  • 5V buck converter – LM2576 simple DIY project
  • ICL7107 PANEL METER
  • Precision 1Hz clock generator circuit
  • Toggle to Momentary Switch Using 555 Monostable

Categories

  • Circuit Tutorials
  • Electronic Circuits
  • Electronic Software

AC Projects Alarm Circuits Amplifier Circuits Amplifiers Antenna Circuits Battery Charger Calculator software Circuit Designer Control Circuits Converter circuits Crossover Circuits Data Sheets Digital Circuits Electronic Switch Flasher Circuits Game Circuits IC Programmer IC Programming Indicator Circuits LED Circuits Light Circuits Logic Circuits Measuring Circuits Meter Circuits Microchip Motor Circuits Music Circuits Oscillator Circuits PCB Designer PIC Power Amplifier Power Guard Power Supply PreAmplifier Circuits Radio Circuits Regulator Circuits Regulator Diagrams Regulator Schematics RF Schematics Sensor Circuits Tester Circuits Timer Circuits Transmitter Circuits Tutorials Vacuum Tube

©2025 Electronic Circuits | WordPress Theme by SuperbThemes