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With the sophisticated electrical systems on new bikes, some way to protect their expensive electronics was needed. When a relay is shut off, reverse EMF current flow is created in the switching coil circuit of the relay. This current is low in Amperage but high in Voltage.
I have soldered a 1000V 1A diode in the ignition switching lead to prevent any current flowing back to the bike. The diode as you can see below is soldered on both sides right in the middle of the strands. It is then covered with Sumitube shrink tube to seal it completely and give it strain relief. Then another layer of Sumitube covers the first as well as attaching the high temperature wire sheathing.
Here is the diode covered in the first layer of Sumitube.
Here the second layer of Sumitube covers the end of the wire sheath too.
Now the wire with the diode is strapped into the harness just out of the relay socket.
You'll never know it's there but your bike will be protected from any damage that may be caused by adding a relay to control a fuse panel.
The fact is, such damage is extremely rare and usually due to unusual circumstances, but for a little extra cost I am now offering this option for all of my fuse panel relay kits. CANBus bikers no longer need to purchase the special device from their dealer.
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