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Graham

Brake lights

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My wife was following me the other day whilst I was out in the 3 and she commented that my brake lights seem to 'come on at the last moment'  the 3 still has the switch in the brake line and I wondering if this is a 'feature' of the system or if there is an issue. If former is there any sort of upgrade to overcome this, if its the after assuming its a replacement ?

 

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Hi Graham,

it may be that the caliper pistons are easy to move and start the braking process before too much pressure is built up - with the brake light pressure switch lagging behind .

It could be a sluggish  switch - they do fail with age.

Or you could fit a mechanical switch if it is possible.

 

Roger

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Hi Graham ~

I fitted a BMW mechanical brake light switch to my 3A.  I didn't like the fact that the hydraulic switch was much too close to the exhaust.

Hope this helps.

Tom.

IMG_1435 - Copy.JPG

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+1 for the mechanical switch above. my hydraulic one failed a couple of years ago.

post-12009-0-75273700-1514046453_thumb.jpg

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Thanks guys just ordered a new mechanical one 

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Graham

Remove the old switch and plug the connection, I had a switch spring a leak with very exciting consequences.

George 

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Graham is not alone. My (hydraulic) brake switch now only operates the lights when I press the brake pedal quite firmly. So I have a new switch ready to fit. It will be the THIRD in eight years.

This switch is widely used across the Triumph range and on MGB and others- one variety with lucar connectors and the early one with screw electrical connections. Enquiring at Moss I understood they had 60 plus in stock. Now you don't carry stock at that level unless there is a high turnover. So I have little faith that my shiny new switch, Pt No 13H2303, in its shiny Intermotor box will last any longer than its predecessors.

I like the look of Tom's mod. Perhaps next time.

 

Phil

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Go mechanical and be confident that the brake lights are on before you start slowing down  

https://www.tr-register.co.uk/group/devon/social-report/2017/10/0855/In-the-Garage-Autumn-Edition

The hydraulic switch lags the brake application even when it’s working. 

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The advantage afforded by the mechanical switch is that, if appropriately adjusted, it will operate the brake lights with very little movement of the brake pedal, hence giving early warning that the brakes are being applied.

Ian Cornish

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post-12009-0-75273700-1514046453_thumb.jpg  +1 for mechanical switch, easy to install, just open up the existing hole.

Bob.

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9 hours ago, Lebro said:

post-12009-0-75273700-1514046453_thumb.jpg  +1 for mechanical switch, easy to install, just open up the existing hole.

Bob.

That’s way too easy Bob :rolleyes:

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+1 for the BMW switch on my TR4A,

a recommendation from this forum from 2018

post-13222-0-05088900-1524164473_thumb.jpg

found an original at ebay

 

Edited by Z320

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