Kriss Motorcycle Products

Technical Support - Turn Signal Cancel unit
Built on questions from users

Installation instructions must be followed exactly and all steps completed prior to applying power or the unit will be damaged. Connecting the unit backwards will damage the unit.

Problem

We are using this particular example to reveal what takes place more times than not.
We are providing this exchange so you can see the results of an incorrect installation. The customer bought a closeout model headlight modulator and returned it because he said it didn't work. We didn't find anything wrong and agreed to give him credit toward one of the newer models. He insisted that he knew what he was doing and did everything correctly.
Customer: I installed the replacement modulator tonight and it doesn't work either. It actually blows the motorcycle fuse when switched On. Prior to installing the unit I took great pains to insure it was connected properly and used a multimeter to confirm each wire of my circuit plug. I also tried it on my bench power supply and it makes the supply go into overload protection. I'm an electrical engineer so I understand electronics. Can I send this thing back for a refund? As much as I want it to work, I'm tired of messing with it.
Us: Sorry but that won't be possible. I can tell you without any doubt that you've connected the unit backwards. If it's blowing the fuse or putting a power supply in overload then you've blown the suppression diode in the circuit which prevents total destruction.
Note: We sent him a photo of the component in question and suggested he open the case and check the diode with an ohmmeter.
Customer: Thanks for the picture and explanation. I took the box apart and checked the diode. Not only was it shorted, but the top was blown off. I replaced the diode and hooked it up to my bench power supply. It worked fine. Before I hook it to the bike I'm going to go through the wiring again and double check things.

Be sure to check your battery, especially after all the testing on an installation.

Question: Purchased TS5007 for Suzuki Bergman 650 in September but just installed this weekend. After installation tried left turn and worked good - canceled after 23 blinks. Tried right turn and it also worked as advertised. Then tried applying brake to reset counter and the turn signals did not shut off 23 blinks after releasing brake. In fact the turn signals do not now turn off at all. Only can turn off manually.
Answer: We advised to double check the wiring to make sure it was connected to the brake and not the taillight.
He found the problem: Problem solved !! Wiring was correct. Problem was battery I was using was low - with fully charged battery everything works properly.

Question: The signals are operating correctly but the unit is not canceling the signals. At first the problem was intermittent. I checked the brake light sensing circuit and thought that might be the problem as the brake light circuit on the 2007 FJT and 2006 Yamaha FJR reads 1.72 volt even when the brakes are off. If this was the case the unit might think the brakes were applied and initiate the cancel interrupt.
Answer: After some extensive testing and troubleshooting the customer discovered a bad connection (poor crimp on a connector he used) where he connected the gray wire to the turn signal flasher output. With a bad connection the unit was not counting the flashes so it never reached the point of turning off the power to the flasher.

Question: My voltage regulator went out and after it was replaced the turn signal cancel unit kept blowing a fuse. I'm wondering if it might have been damaged.
Answer: If the voltage coming out of the voltage/rectifier was in excess of about 18 volts it would have blown a component on our circuit board that's designed to try and protect the circuit from excessively high voltage. If this is the case the component can be replaced if the unit is returned to the factory.

Question: How do I bench test the Turn Signal Cancel Unit?
Answer: Connect the Gray sense wire to a 12 volt bulb (even a test light is OK)(don't forget to connect the ground side of the bulb). Attach the Green ground wire to battery negative first and then Red to battery positive through a fuse, 5 amps is fine. Briefly touch the Yellow wire to the test light probe (where the gray wire is connected) 23 times using a steady rhythm. From the factory the unit is programmed for a count of 23 flashes and then it will shut off the power to the yellow wire (bulb). If the green/red wire has 12 volts applied to it (this is the brake light sense wire) the counting will be stopped and the unit will not shut off the power. If the unit passes these tests the unit is functioning properly.

Always use a test light when checking circuits.