[David Robertson]

I need to reset the brake warning light on my dashboard. If I remember right you step hard on the brake peddle and bleed the right rear wheel cylinder?
Thanks for any help.
DR.

 

[1969XR7Vert]

David,

Try the rear (either side, doesn't matter) and if the light doesn't go out, try the front (again, either side). And you should not have to press overly hard (or you could go past the center (off) position and back on the other side).

 

[towcat]

How long has the light been on, if this just happened you might be able to reset it, but most of the time these get stuck and won't reset without a cleaning of the distribution block.

 

[1969XR7Vert]

How long has the light been on, if this just happened you might be able to reset it, but most of the time these get stuck and won't reset without a cleaning of the distribution block.

Good point Carlton.

 

[David Robertson]

Thanks for your help Bob and Towcat. It has been on for a while, I hope it moves!
Thanks again,
DR.

 

[Bad69cat]

They are not easy to clean - Don has a how to posted up on his site and or youtube if your feeling lucky! LOL Hopefully a little bleeding will get it done! Good Luck! That reminds me, I need to flush out the lines in mine this fall....easier that fighting that little rusted out spring which is what seems to happen....

 

[tlchaffin]

After the distribution block is cleaned and recentered, but before installing the switch, I have found only one foolproof way to be sure that is remains centered while bleeding the brakes. I was unable to recenter it by stepping hard on the brakes, etc. Instead, get a cap nut that matches the switch threads. Then cut a small piece of heavy wire that fits into the centering slot and apply enough pressure with the cap nut to prevent the valve piston from moving. After the brakes are completely bled, remove the nut and wire and install the switch. It works every time.

 

[1969XR7Vert]

After the distribution block is cleaned and recentered, but before installing the switch, I have found only one foolproof way to be sure that is remains centered while bleeding the brakes. I was unable to recenter it by stepping hard on the brakes, etc. Instead, get a cap nut that matches the switch threads. Then cut a small piece of heavy wire that fits into the centering slot and apply enough pressure with the cap nut to prevent the valve piston from moving. After the brakes are completely bled, remove the nut and wire and install the switch. It works every time.

It can be difficult. For me what made it so was a brake light warning switch in which the return spring was stuck. Without the spring pushing the switch plunger back down, you'll never get the light to go out. Once I replaced the switch, it was a simple matter to center the switch/make the light go out using the bleeders.

Holding the shuttle centered until you have the brakes all set is fine too, preferable even.

 

[sah62]

After the distribution block is cleaned and recentered, but before installing the switch, I have found only one foolproof way to be sure that is remains centered while bleeding the brakes. I was unable to recenter it by stepping hard on the brakes, etc. Instead, get a cap nut that matches the switch threads. Then cut a small piece of heavy wire that fits into the centering slot and apply enough pressure with the cap nut to prevent the valve piston from moving. After the brakes are completely bled, remove the nut and wire and install the switch. It works every time.

Kind of like this tool?

https://www.musclecarresearch.com/brake-valve-tool

 

[Harvey]

I think I am going to invest in one of them!

 

[tlchaffin]

That looks great but I think for a '68 you need female threads. Do they make that?

 

[towcat]

68 uses the same tool, male threads.

 

[tlchaffin]

You are correct. It has been too long since I did that chore.