brake switch

If a known-good brake light switch is staying on after brake use, it means that somehowm there is residual pressure in the circuit that the switch is screwed into.
1)- Have you changed calipers or master cylinders? Some people add a residual pressure valve to the brakes to do just this: hold 2-5 psi in the brake circuits for quicker reactions. Normally, it takes more pressure than that to actuate the brake light switch, though.
2)- If the brakes are stock, the switch is in the rear brakes line. Start checking that part of your brakes for what is holding pressure. Stuck caliper?
3)- the VW brake light switch is a completely different thread than the DeTomaso switch. It can be made to work but you'll have to rethread the fitting.

I"m replumbing my brakes and am planning on eliminating the shuttle valve/block. I'd like to retain a brake line pressure switch. Can anyone recommend a comaptible brake light pressure switch with an American pipe thread?

I picked up a switch for a 75 Volkswagen Beetle. It does indeed have different threads. I was lucky and had a nipple and connecter laying around, and was able to install the new switch. I checked it out, and all works fine. I guess there was a problem with the old switch, afterall.
Thanks for your help.
Paul #3040

I've written an article on upgrading the brake master, which includes details about this brake swtich, and it's replacement, and alternates. It will appear in the next PI issue.
For 'pre-release' details, contact me directly.

Melton01@msn.com

Chuck