Buy a Test Light: https://www.commonmotor.com/testlig...

Read our full technical article: https://support.commonmotor.com/hc/e...

Be sure to watch our understanding ground circuit and positive circuit before troubleshooting your ignition circuit:

   • Understanding the Ground Circuit on a...  
   • Understand the Positive Circuit on a ...  

The turn signal circuit is by far the circuit we get the most questions on. When broken down to its core concepts, it might actually be one of the most simple. Take away the flasher relay and you have a simple onandoff circuit that you can fully test and troubleshoot with the help of a test light and solid battery. In this article, we are going to help you understand the wiring concepts, circuit layout, and troubleshooting techniques for getting your flashers flashing and your blinkers blinking.

Buy parts and pieces for your vintage Honda motorcycle at commonmotor.com

_________________________________

Need help with your vintage Honda? Attend the CMC Repair Academy and watch the full playlist of repair videos for your motorcycle:

   • CB175/CL175/SL175/CB200/CL200  
   • CB350/CL350/SL350  
   • CB360/CL360  
   • CB450/CL450/CB500t  
   • CB550 / CB500F  
   • CB750  
   • CB350F / CB400F  
_________________________________

Contents of this video:
00:00 Introduction
00:34 The Turn Signal Circuit Layout
02:13 The Simplified Honda Turn Signal Circuit Wiring Diagram
02:43 Testing for 12v Positive at the Turn Signal Relay
06:05 Testing the Left Handlebar Switch
08:12 Testing the 4way bullet connectors for the Left and Right Turn Signals
10:16 Testing the Turn Signal Indicator Bulb
13:20 Testing the Front Turn Signals
16:30 Testing the Rear Turn Signals
19:29 Testing the Flasher Relay
22:10 Summary and Demonstration