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relocation of brake light switch
Posted: Mon May 14, 2007 2:38 pm
by malminor
I am fitting a remote servo but noticed in the Owen Burton book the brake light switch should be in the input side of the brake line to the servo cylinder, where would be the best place to locate and what fittings would I need, Apparantly the extra pressure causes the switch to delay switching off the brake lights?.
switch
Posted: Mon May 14, 2007 4:04 pm
by Willie
It has had no adverse effect on my minor.
Posted: Mon May 14, 2007 4:24 pm
by Stig
As it's a pressure switch wouldn't that mean there's a delay in releasing the brakes too? I hope not.
Posted: Mon May 14, 2007 8:46 pm
by bmcecosse
Probably!
Posted: Tue May 15, 2007 9:53 am
by Rob_Jennings
keep it where it is, putting it on the 'input' side may mean it does not light as in theory the pressure on the input side is 1/2 that of the output (thats what the servo is there for!!)
Posted: Tue May 15, 2007 5:37 pm
by DaveC
good point Rob! Mine's on the servo output side. No probs..
Posted: Tue May 15, 2007 5:45 pm
by bigginger
I'm puzzled. Why would leaving it operating on the side where it was designed to work be a problem?
brake light switch
Posted: Tue May 15, 2007 6:05 pm
by Willie
He had heard that the increased servo pressure would cause the brake lights to be slow to extinguish.
Posted: Tue May 15, 2007 8:26 pm
by bigginger
Eeer - OK. Not in my experience, fwiw
Posted: Tue May 15, 2007 8:38 pm
by aupickup
that would be the owen burton book
Posted: Tue May 15, 2007 8:48 pm
by bigginger
Yup. I have an opinion of the man, but good or bad I'm not allowed to give it...
Posted: Wed May 16, 2007 8:17 am
by DaveC
I would have thought that if the light was kept on by pressure then the shoes would also bind. A cause of this could be the lack of the 3/4 inch play at the brake pedal, I wouldn't think that the servo would cause any binding effect. I'd leave the switch where it is...
Posted: Wed May 16, 2007 9:03 pm
by minor_hickup
I'd be more worried about any higher pressure damaging the brake light switch. Temperamental as they can be. I'm sure hard braking force is what kills them. My last one died after someone cut me up....coincidence?
Posted: Thu May 17, 2007 9:38 am
by Rob_Jennings
they should be able to withstand the pressure. the fact that they don't is because the modern copies are clearly not being built to specification ;-( a common problem with even simple replacement parts.
Posted: Sun May 20, 2007 2:04 pm
by malminor
Might as well leave it where it is, I am fitting all new brake pipes.
Mr B doesn't explain in any detail where and how to relocate, the switch has a different thread to everything else and I can't find a suitable tee piece.
I could use another cross piece, but that gets even more complicated.
Anyone fitted a mechanical switch into the master cylinder / push rod area? .
I gather 1000's of these servo conversions have been fitted over the years.
Posted: Sun May 20, 2007 2:29 pm
by jonathon
In my opinion the switch is perfectly okay in its standard position, when fitting a servo.
