Front brake light stays on

Hi maybe you have to get the falt cleared from ecu.

Usually when I see this, it is a bad brake light switch in the right hand handlebar switch housing.

Most of the time if the front brake master cylinder was incorrectly installed, it'll break off the little nub on the switch.
This nub on the switch is what the front brake lever pushes against when it is released, causing the brake light to go out.

You'll need to open up the switch housing, unsolder the old switch, and solder in a new one.

But first, open the housing and you can manually press on the switch to see if the brake lights go out.

Have you recently done any work to the right handlebar or had the front brake lever off? If so, there's a good chance the lever wasn't reinstalled properly, or the switch is broken.

You may have a bad rear brake light switch. Find the rear brake master cylinder and the metal hose coming out of it going to the rear brake. Follow the line as it goes under the bike. You'll find a tee fitting in the line with a pressure switch in the line. The switch will have at least two wires plugged onto it. Unplug the wires and see if the brake light goes out. If so, replace the switch.

Good Luck
Steve

sounds like you have a bad brake light switch, its located on the brake pedal , you can unplug the switch and check for power at the connector with a test light , find the wire that lights up ,plug it back in and go to the other wire with test light and with test light probbed in other wire push brake pedal in and test light should light up if not ,bad switch.

Replace the starter relay.

it has a brake light switch connected in the line with a T connector between the rear master cylinder and the rear caliper,sounds like the switch is stuck,locate the switch and unplug it to see if it goes out,if so prolly faulty switch unless caliper is stuck

i would start with the fuses, then move on to the wire connectors from there.

You need to check you rear brake master cylinder. Something is wrong with this as your rear brake is not working. The brake light for the rear brake is activated by a pressure switch whereas your front brake light is activated by an normal push/release switch. Fix your rear brake problem and the brake light problem will be repaired as well.

It may be time to rebuild your rear brake master cylinder.