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sjf911 sjf911 is offline
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Join Date: Dec 2006
Location: Idaho
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The MS uses a ground switch to activate the fuel pump. On the SC, the relay is switched on with a +12V signal so backward of what MS supplies. If the 930 is similar, you can either interpose a new relay to switch a +12V source to the existing fuel pump relays or rewire the existing relays to accept a ground signal. I chose to rewire the OEM fuel pump relay to be compatable with the MS signal.
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Steve
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1983 3.4L 911SC turbo. Sold
Old 04-25-2013, 07:53 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #25 (permalink)