Join Date: Apr 2005
Location: SW Washington State
You find a place where you want to mount it and do so. Run the hot lead and ground just like you did for the powerlet straight to the battery, fusing the hot lead. Using wire capable of carrying the total load the accessory box could possibly see, both the hot lead and the ground need to be the same size wire. To many people will only use a large diameter wire on the hot lead and use whatever is handy on the negative side.
The problem with this type wiring of accessory power outlets is that it is always hot, regardless if the bike is running or not, meaning if you forget to turn something off or a passerby flips a switch like the grip heaters then you could return to a drained battery. If you don't need anything powered when the bike is not running then wiring the power to the accessory box via a relay to engergize it is the besy way to do it.
Buy a 4 or 5 pole relay from the auto parts store, you'll find them in a blister pack for under $5.00 in the driving/fog light section. As above run a fused hot lead and a ground wire to the relay. Connecting the hot side from the battery to the terminal marked 30, run the ground to #86. Terminal 87 will be the hot lead to the accessory box. And finally connect the terminal 85 to a power source that is only on when the bikes key is on. This need not be a high power line, you can tap into the brake light or anything else that is powered like the unused connector by the radiator.
So what happens then is when you start the bike or turn on the key the hot lead at 85 energizes the relay, sending power out of 87 to the box powering the accessories. If you have a 5 pole relay, the terminal marked 87a will be a hot connection when the relay is not enegized and can be used to power some item you want to use when the bike is not running. You would want to run this on a seperate circuit from the accessory box.
On fuses, even though the bike does have limited power to run too many accessories it does depend on load of each item, but the main fuse going from the battery to the relay should be rated for the entire load you plan on using plus 10%, regardless if you plan on using the total amount. One could forget and start the bike drawing too much power and blow the fuse. So add up the load, add your 10% and use the fuse available closest to that value.
Easy as pie, hope this helps.
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