Brake light switch

[Dave Lane]

Last weekend the Singers brake lights went all to pot and only came on if you really braked hard .
Ive fitted a new switch and its now working as it should .
Anyway just to show you what goes tits up in them ive cut the old one up .
You can see brake fluid has leaked inside the electricery part , the copper contact is burnt especially on one side and the two small contacts on tother end of the spade terminals are black and corroded - springs are the only bits that are still OK .

[John A. Ross]

Nice one Dave, never actually dissected one

These actually switcha fair bit of juice, 42W so I reckon at least 3A plus for a lot of operations, I am actually surprised they last as long !

Just think

The whole of Hildas switch gear/plate on the auto transmission sit in the oil in the gerabox sump and good for 100k miles is used sensibly. Your gearchange is a commbination of ball bearings running round channels, solenoids popping up and switches controlling them in the oil.

It is actually a work of art, maybe PMCG pat will post a picture !