hi i have had mine about 2 months had same problem with indicators flashing when brakes applied failed mot with same problem  checked all wiring no joy, so looked under seat for relay and for some reason seen colour wire same as brakeswitch wire so took chance and snipped wire on relay and now can brake without indicators flashing but everything still works, only diff is now the beeping noise to tell you indicators are on is not so loud not a bad thing because it was far to loud anyway . hope this helps, ps if you look at brake switch on footbrake live not earth then lift seat and on relay cut same colour wire as on brake.