I fought with my warning light for a few days too. Replaced the master cylinder, bled rear, bled front, drove around, bled again, etc. The light never even flickered. I gave up and unplugged the switch. It seems to stop just fine. Maybe I'll try again when it gets warmer.
Steve
1970 F350 DRW Factory 9' Platform/Stake, 360, T18.
Passed on to new care taker July, 2013
My light right above the e-brake stays on all the time nad the e-brake when you press it doesn't stay down. I need to look into it and try to get them fixed.
1969 Ford F-100. 302 4 barrel, C4 auto, 9in 3.50 open rear, headers, power steering, Turq/wht, Under restoration. In other words, in a million pieces!!!