How do I locate the ACC wire?
Start by finding the fuse box, then use a multimeter to identify the ACC wire.
Set your multimeter to the DC voltage setting. Connect the black meter lead to the battery negative terminal.
Use the red meter lead to probe the various wires. The ACC wire will show voltage when the ignition is on, but no voltage when the ignition is off.
That wire that switches from live to not live based on whether the ignition is on or off - that's your ACC or accessory wire.
Why is finding the ACC wire important?
The ACC wire provides switched power from the battery. Connecting accessories to this wire allows them to run only when your bike's ignition is turned on, preventing battery drain when parked.
How to Connect the Yellow Cable Without a Fuse Box?
If your bike lacks a fuse box, you can connect the yellow cable to the tail light wiring harness instead. To access the tail light wiring, remove the seat and rear fender panels to expose the area around the tail light. Next, remove the tail light housing cover. Use a multimeter to test the wires and identify the one with power running to the tail light—this is the wire to connect the yellow cable to.
Avoid Connecting ACC Wire to the 3-Pin
We do not recommend connecting the ACC Wire to the 3-Pin Navigation Interface, as it may cause problems with the entire motorcycle circuit if the ACC encounters any problems.
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