1981 KZ750 H LTD
The motorcycle came from the factory with automatic turn signals and ever since I bought the bike they haven’t worked. I decided after riding a friends Harley Davidson sportster they were quite nice and decided to repair mine. Beginning my diagnostic I found out how they work and began to work my way through the system.
The speedometer has a distance sensor that gets continuity 4 times for every complete rotation of the drive cable. Using a multimeter, I confirmed my speedometer distance sensor was working properly.
The switch itself works manually just fine, however to test the solenoid inside the switch housing, power has to be sent to the white/green wire coming from the auto canceling module. By jumping this wire, it will trigger the solenoid and shut off the turn signal. so I have confirmed the issue is not inside of the switch.
I have also checked for power to the yellow wire and ground to the black/yellow wire and all checks out there. Power is only sent to the module when the switch is placed in the A for automatic position and it does indicate battery voltage at the wire.
The blue/white wire sends current to the switch from the module, once the turn signals are turned on, in either direction, it will send continuity back down the red/white wire to the module. This I what I believe begins the modules 4 second count down timer until it begins to analyze the distance sensor however I do not know for sure.
The only other wire is a white/red wire that goes from the module to the switch. I am unclear on the purpose of that wire however it does get continuity all the way to the switch so I have reason to believe the switch is properly working so the white/red wire is working as well. If anyone knows and could provide the guidance I would greatly appreciate it.
According to the manual, if the wires all test well then it says to replace the module. Thus I did exactly that. After days of waiting for it to arrive it finally does. After installing it, nothing has changed. It still does not work. Can it be possible that 2 modules were bad? Is the auto canceling module known to go bad?