Getting power on ground wire but no power to fuel pump?

1992 FORD F-150
220,000 MILES • 6 CYL • 2WD • MANUAL
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KHENRI
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getting power on ground wire but no power to fuel pump. There is power on main yellow wire power on red ignition switch and power on ground wire on back of fuse box, fuel pump shorted inside fuel tank on red wire, so we are trying to replace with new fuel pump no power to pump (4.9L)
Dec 16, 2007 at 12:53 PM
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RASMATAZ
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Have you check the fuel pump relay and inertia switch? Here is the engine and fuel pump wiring diagrams with a guide to help you do some testing.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Feb 15, 2021 at 9:54 AM
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KHENRI
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both switches have been checked and they are okay.
Feb 15, 2021 at 9:54 AM
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RASMATAZ
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Do you have power at inertia switch dark green/yellow? when key is in On position
Feb 15, 2021 at 9:54 AM
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KHENRI
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Have power on ground wire from fuel pump relay to 60 pin plug, ground to fuel pump has no power from
cab to fuel pump, power from switch to relay is good
Feb 15, 2021 at 9:54 AM
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RASMATAZ
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Do you have a dark green and yellow wire at the fuel pump connector? When the ECU energizes the fuel pump relay all you got is 2 secs to check for power at the pump connector. When the truck fires up the inertia switch powers the pump. Check for power at pin No.8 at ECU.


https://images.2carpros.com/forum/automotive_pictures/12900_4_3.jpg

Feb 15, 2021 at 9:54 AM
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KHENRI
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Thank you, you been very helpful I will check out the things you have pointed out. Also do you make housecalls lol!!!!!!!!!!!!
Feb 15, 2021 at 9:54 AM
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RASMATAZ
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I'll be waiting for your return if further assistance is needed. BTW I don't think! my husband would like that-sorry. Lol
Feb 15, 2021 at 9:54 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.