by 250_Sprint » Wed May 10, 2023 10:24 pm
With the transmission in neutral, start and get the engine warm enough so she idles on her own. Step on the brake pedal. Does the engine die? This duplicates the problem on the road.
If it does die, remove the brake light bulb, start the engine and step on the brake pedal. Does the engine die? If so, the bulb is good.
Now disconnect the two wires at the brake lamp switch, start the engine and touch the two brake switch wires together. Does the engine die? If so, test the brake lamp switch for an internal short. Use a multimeter or a light bulb and power source do run this test.
If the brake lamp switch tests good, there may be a short in your harness. Visual scrutiny and multimeter are the only test procedures and it can be time consuming.
You may also have a short in the wires of the magneto assembly. Again, time consuming.
Of course there is one more suggestion and you do this at your own discretion: don’t use your rear brake. lol