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Here is my set up which worked perfectly when the nipples were correctly open.
However, I have another query. After finishing, I sat in the car with the ignition on but engine off, and when I pressed the brake peddle, it the brake light switch is making a clicking noise. I've never heard that noise before, but probably never pressed the brake peddle without the engine running whilst the ignition is on. Is this normal?

2004 Series 1 Roadster