I would love to install some electronic accessories such as fog lamps, USB power and DVR camera (just to name a few) to my newly acquired BMW R1200GS LC. As I was researching on how to wire up to supply power to these components, I’ve come across a diverse range of opinions from the “unlike the Japanese bikes, you should never mess with the CAN-bus system of the BMW” to the really expensive solutions such as Fuzeblocks (USD90) and Hex ezCan (USD170).
While the above gadgets have some additional fanciful features to justify their price tags, in reality, I was searching for a simple, elegant, inexpensive solution to power my electronics without interfering with the CAN-bus on the BMW and must also not fry the onboard electronics of the R1200GS should any of the add-on electronics decide to turn rogue.
Had previously installed my bikecam and USB power port at a bike shop. What the mechanic did was to hard wire the bikecam and USB outlet to a “Ignition ON” wire on the bike. No fuse. When I asked him what if one of these cheapo made-in-China stuff short circuits? He told me that the main fuse will blow lor.
I never liked the idea of blowing the vehicle’s fuse with these “add-on” stuff. Because, the quality of these stuff are sometimes questionable, and blowing the fuse will leave you stranded.
I’d much rather have a separate circuit with its own fuse to support these aftermarket electronic add ons. So, I headed to the drawing board and came up with this…
Edit: Subsequently repalced the 30A fuse with a 10A, and the 20A fuse with a 5A one instead.