Brake pressure switch

Is it possible to change a brake pressure switch without draining the brake fluid?

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Mine is leaking and the brake lights are not working but, the electrics are fine.

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Yes, if you whip it out and swap it quick.

 

Yes just done mine

 

Yes , I find covering the filler neck with a piece of plastic bag and screwing the cap on creates a seal and vacuum when the switch is unscrewed meaning a negligible loss of fluid. I've changed calipers using this top-tip , minor bleeding to fill the caliper but it actually works...

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^top tip. Clingfilm works as well

 

I'll let you know how it goes when the switch arrives.

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It'll be fine with quick fingers...

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