Interesting M8 thing.
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Seasoned HDF Member
Joined: Dec 2005
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From: poway
Easy explanation, every FL series Harley since 2014 has a CAN BUS electrical system on it, which is not like your traditional fuse/circuit/wire arrangement you might be used to. The electrical system will stay on for appx 30 seconds after ignition cut-off, that's pretty typical for all CAN BUS systems which you see in modern cars as well. You also have to be more careful if adding electrics in a CAN BUS system (such as LED turn signals, driving lamps, air horns, etc) as the old splice/tap method can set a system fault. For light reading on this kind of electrical system go here:
https://sewelldirect.com/learning-ce...bus-technology
https://sewelldirect.com/learning-ce...bus-technology
One thing to note is that all of the devices that use the CAN but have power even after the ignition is shut off. ABS, both handlebar switches, Speedo, Secutity, and ECM, all have power directly from the battery (Through a fuse). It's one of the reasons it's advisable to pull the main fuse when working on the wiring. The buss at idle does not draw any power. The CAN devices go into a lower power mode while the motorcycle ignition is off. Devices draw in the micro amps.
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Seasoned HDF Member
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From: poway
When something fails you can always take the bike to a shop.. They can't help your knee tho..
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Bob
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Seasoned HDF Member
Joined: Dec 2005
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From: poway
I expected it to be common to all bikes that have a BCM which HD started about the same time they went CAN..
Tourer
Joined: Nov 2014
Posts: 452
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From: SW Florida
My shop will claim they can fix your knee. For a price of course. I even have friends that can fix others knees for you. For a price of course. snicker
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