Is there a trick to changing the brake light switches on the master cylinder
that won't fill the area behind the dash with brake fluid? Do I need to drain
the system at a wheel and then bleed the system. Or if the switch is unscrewed
while the system is not under pressure can it bee done with little spillage.
If this works must I then bleed the system?

Thanks.
Jeff
83.5 Westy
LA,CA