Fuel pump wires

Tiny
MIKEAUTO1
  • MEMBER
  • 1998 LINCOLN CONTINENTAL
  • 4.6L
  • V8
  • FWD
  • AUTOMATIC
  • 40,000 MILES
Okay, please tell me what color wires and which. Wires should have twelve volts with key on. At fuel pump connector?
Monday, February 6th, 2017 AT 11:30 AM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Oh, if only it was that simple. This is a computer controlled, Pulse Width Modulated system that sends a variable pulse modulation to the pump to vary the pressure.
The only way to accurately diagnose this system is with a bidirectional scan tool. There is a rail pressure sensor that can be read from the scanner while the scanner can vary the pulse to the pump for testing.
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Monday, February 6th, 2017 AT 5:45 PM

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