have found the switched superseal plug under the seat of my bike. does anyone know the max amperage that this supply is safe with? at present, I have now wired a couple of accessory daytime running lights (20 w) and an accessory usb socket so I assume about 2 amp so far. I would like to install heated grips and wonder if the socket will allow that also?
these would use a further 2.5 Amps. Does anyone know if the accessory socket can handle 5 amp but really for safety 7.5 amps?
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which model bike is it?
sorry, it is a 2021 v7 850 E5 special
According to the wiring diagram I’ve got, it’s on the same circuit as headlamp flasher (‘Pass’ button) and ‘Light logic relay’ (ECU switches headlight on after start-up), and it comes off fuse ‘B’ in the fuebox, 15A.
If you blow this fuse you will have no headlight.
Appendix (edit): 850 Special uses a H4 bulb so that’s 5 Amps for high beam.
If you want to power various accessories you could look at a Thunderbox by Heal Tech. A great little device which I have been using on all my bikes for several years. About £80 and you can move it from bike to bike when you change bikes and connect up to 4 or up to 8 accessories using simple Wago connectors.
Thanks I was actually looking at doing that if the switched output has too low a current rating.
thanks for that, mike H, that is helpful, there does therefore seem to be a bit of headroom with this output and the cable to the socket looks like 15 amp type, so should be ok??? I will let you know if my headlight fails! 
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I would have hoped 15A was enough, bearing in mind that isn’t the current that blows the fuse, but the maximum.
I wired my day light running lights into the parking light circuit as I run with the headlight on as well just make you have canbus lights.