Mornin'. A couple of days ago I replaced the brake booster and MC (purchased as a unit from NAPA) and I haven't been able to cure a hard brake pedal. My vacuum pump makes & holds 22" (per Mightyvac). In addition I get an intermittent flash of the BRAKE light while driving.
It feels like the booster isn't working like it should but I don't know how to test it.
Also, it would be great if one of y'all would help me understand what causes the BRAKE light to come on. I see an electrical connection at the "proportioning" valve and one on what appears to be a vacuum switch.
Thank you in advance. I'm sure that once y'all chime in I'll hear my head pop out.
By the way, this scenario is occurring on the '85 4x4 in my signature, if it matters.
It feels like the booster isn't working like it should but I don't know how to test it.
Also, it would be great if one of y'all would help me understand what causes the BRAKE light to come on. I see an electrical connection at the "proportioning" valve and one on what appears to be a vacuum switch.
Thank you in advance. I'm sure that once y'all chime in I'll hear my head pop out.
By the way, this scenario is occurring on the '85 4x4 in my signature, if it matters.