Bad 'Low Vacuum Indicator Switch'?
While diagnosing a problem with my brakes (brake light) I unplugged the Low Vacuum Indicator Switch to confirm that I had a problem with the vacuum system and not the hydraulics. I had a busted brake line and vacuum pump problem-both are fixed now. However, when I plugged it back in, and before replacing the vacuum pump, I noticed that the brake light was not coming on (ABS light was still on). With the new vacuum pump, i'm pulling 23 in.hg no problem. To see if something was wrong with the vacuum switch, I pulled one of the vacuum caps off and turned the engine on. Brake light did not come on. I turned it off, sprayed both end of the connection for the vacuum switch with electric parts cleaner and reconnected. Tried again with no vacuum cap and the brake light does not come on. When I engage the parking brake, the brake light does come on. I'm guessing that there is something wrong with vacuum switch, that it needs to be replaced, and that it's causing my ABS light to come on. FYI, the ABS code is 12 flashes. Anybody agree or disagree?