my440 wrote:
Griff!! Your a wealth of information. I got to have a look over this all. Thanks kindly. I'm leaning on changing both the master cylinder and booster. Been afew years but just figured I could tweak something to get that dang peddle to go up just a tad to switch off the brake lights.
When the engine is off and the peddle is pushed it returns back enough where the lights go out.
Other than that brakes work perfect. Nice and firm, no spongy peddle, just changed all pads drums calipers.
A work in progress.
I just reread this and noticed 'engine off' line.
Booster!! Just enough wear to pull the pedal in when vacuum is applied.
If you can get your hands on a hand vacuum pump (
this or equivalent), you can test to be sure. With the engine off and this connected to the booster, check for good on/off of the light. Then pump this once or twice, without touching the brake pedal, and see if the rear lights come on. (You may need someone watching the rear lights while you do this.)
You may need to press and release the brake pedal once, with vacuum applied, to trigger the problem.
