Hi Guys-------- Hi Jamesy..yes, there's a plastic micro-switch that sits up against the underside of the lever... ......Normally, with the lever at rest, the switch centre plunger is compressed and the brake light is OFF........When you pull the lever the centre plunger is released and makes internal electrical contact and the brake light comes on...........Please be aware that the plastic quality is not particularly good and they can vibrate loose to give either an intermittent or permanent BRAKE ON light !!..........I've had to do two out of the 4 Bullets owned to date.........Here is the switch concerned}------------
http://accessories.hitchcocksmotorcycle ... ges%2F4844 ---------- Incidentally you should get the same value discharge on the Ammeter when you apply the rear brake ( same bulb--different switch ).......