View Single Post
sjf911 sjf911 is offline
Registered User
sjf911's Avatar
Join Date: Dec 2006
Location: Idaho
Posts: 5,727
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.
Sapere aude
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)