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Subject:Re: No Start Cause: Relay Failure. PICS, Thoughts.
From:David Beierl
Date:Thu, 7 Feb 2013 01:37:12 -0500

At 05:47 PM 2/6/2013, Scott Daniel - Turbovans wrote:
>Every EFI system ECU  I have ever seen energizes the fuel pump relay by
>supplying ground to it.  It's the common strategy.

A lot of electronic switching is done that way because the
open-collector switching circuit is cheap and efficient and versatile.

Yrs,
d