No start, cannot hear the pump turn on?

2007 BUICK TERRAZA
218,000 MILES • 3.9L • 6 CYL • 4WD • AUTOMATIC
Avatar
JUJUJU
  • MEMBER
  • 2 POSTS
Can't hear fuel pump run, no fuel pressure, cranks great but no start of course.
No access panel in the van, hard to trace wires. The only wiring diagram I have found so far is for a 2006 and I don't think they are the same. Digital VOM reads ' OL' when checking ground continuity.
Not sure if I'm checking correct pins, due to a diagram for a different year.
Working on it in a gravel driveway, not looking forward to dropping the tank if I can get out of it.
Relay and fuse are good.
Van belongs to an older, disabled person with below poverty level income and has been run low, low and out of fuel several times. I'll buy the parts and do the labor, but don't want to mess it up worse. Semper Fi.
Aug 14, 2022 at 12:45 PM
Advertisement
Avatar
SQM
  • CERTIFIED EXPERT
  • 6,383 POSTS
Hello,

So, you are down to either a bad pump or faulty wiring.
I have attached the wiring schematics for this vehicle below.
Also included is the test procedure, which can help you determine the issue.

Let me know of any questions.
Thank you.
Aug 14, 2022 at 5:21 PM
Avatar
JUJUJU
  • MEMBER
  • 2 POSTS
Thanks for your help. Can't get back at this vehicle until Sunday. Swamped at work. Will stay in touch as best I can, and let you know how things go. Thanks again!!
Aug 16, 2022 at 6:23 PM
Advertisement
Avatar
SQM
  • CERTIFIED EXPERT
  • 6,383 POSTS
You are welcome.
Let me know how it goes.
Aug 17, 2022 at 5:49 PM