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AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 25235
Experience:  ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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I have a 2006 Chevrolet 1500 5.3 liter I did a frame swap

Customer Question

I have a 2006 Chevrolet 1500 5.3 liter I did a frame swap and now the fuel pump is not turning on, I changed the relay and 20 amp fuse, checked ground and wiring all looks good. When I put my key on ignition the check engine light is on but when I put truck on ignition relay does no click. Only clicks of ignition is on and I take 20 amp fuse out and in. Any suggestions ? I checked for power at lager plug on pump and nothing small plug has power.
Submitted: 9 months ago.
Category: Chevy
Expert:  AMEDEE replied 9 months ago.

Hello and welcome! My name isCustomerand I can assist you with your question. Are you looking for some possible causes or would you like me to walk you through this diagnoses?

Customer: replied 9 months ago.
I'm next to the truck right now. What ever you think is better to get this thing going
Customer: replied 9 months ago.
If I spray fuel into Intake truck starts. So there is no spark issue etc.
Expert:  AMEDEE replied 9 months ago.

Its really simple. Remove the starter relay and check for two powers and one ground going into the relay (on the female terminals) while cranking. Let me know

Customer: replied 9 months ago.
With relay out truck won't crank
Expert:  AMEDEE replied 9 months ago.

Sure it will. It will crank, but not start.

Customer: replied 9 months ago.
If I remove starter relay it won't crank if I put it back in it cranks
Customer: replied 9 months ago.
The Delphi starter relay right. ?
Expert:  AMEDEE replied 9 months ago.

Sorry.. your right. I meant to say remove the fuel pump relay. Not the starter relay. My mistake.

Customer: replied 9 months ago.
86 gets power while cranking then goes of after few secs30 has constant power87 and 85 no power
Expert:  AMEDEE replied 9 months ago.

Is there is a ground going into the fuel pump relay? There should be..

Expert:  AMEDEE replied 9 months ago.

Here is a wiring diagram of this circuit

Customer: replied 9 months ago.
Where does the ground come out of ?
Customer: replied 9 months ago.
Harness to fuse box or ?
Expert:  AMEDEE replied 9 months ago.

It is G104. Number 3 in the pic.

Customer: replied 9 months ago.
it's grounded
Expert:  AMEDEE replied 9 months ago.

So is there is a ground going into the relay?

Customer: replied 9 months ago.
A ground going into harness under the box where relay is located ?
Expert:  AMEDEE replied 9 months ago.

YES.. is there is a ground going into the relay?

Customer: replied 9 months ago.
There is not where should it go on the fuse box ?
Customer: replied 9 months ago.
I cleaned one of the grounds on the frame by driver side door. Now fuel pump turns on but engine does not start unless I dump fuel into intake like before. Another weird thing if I turn hazards on check engine Blinks with hazards
Expert:  AMEDEE replied 9 months ago.

Good morning and sorry for the delay! YES, that is rather odd. If you look at the wiring diagram I sent, its the black wire that supplies a ground to the fuel pump relay. Just follow the black wire from G104 to the fuel pump relay to see where you are missing the ground. If this is the only problem, once this is fixed, the engine should start and run. You can even ground this wire manually to see if the engine will start and run.

Expert:  AMEDEE replied 8 months ago.

Hello! It'sCustomerfrom just answer.

I am just checking in to see if you need any further assistance?

Let me know!