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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,554
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The safety switch turns off the fuel pump when the engine is not turning over. The reason to bypass is to have a manual way to test the fuel pump circuit when the engine is not turning on at all. Although, there are better way of doing that than to provide a bypass ground like that. But, that was a lot of work that person went through to implement the switch so there must be other reasons for it.
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Porsche 2005 GT3, 2006 997S with bore-scoring
Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS
Disposable Car: BMW 530xiT, 2008 Mini Cooper S
Two-wheel art: Ducati 907IE, Ducati 851
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