[TR] brake pressure differential switch

[Jim Muller]

On 25 Jan 2009 at 20:22, Gary Nafziger wrote:

> I think its stuck in the center so maybe just best left alone?

What exactly leads you to think there is something wrong with it?  
The most common problem is for it to be stuck over to one side, 
keeping the brake warning light lit.  PO's have been known to solve 
that by unplugging the wire, which means the oil pressure light won't 
come on either, seeing as how they are wired together at least on 
some cars.  With any other failure mode except leaking, unless you 
experienced brake failure and it didn't come on, you wouldn't know.  
Even so, it takes a pretty healthy pressure differential to actuate 
the warning.  The problem then is how to re-center it.  If it is 
corroded or gummed up inside, the piston will be stuck and it won't 
re-center easily.

There isn't much to one.  Disassembly is easy.  Re-assembly too.

-- 
Jim Muller
jimmuller at rcn.com
'80 Spitfire, '70 GT6+