Fuel pump with LS engine

[Ramiro0727]

So my boy swapped his heads out and he was putting the headers back on the fire it up again and when he was connecting the battery again he accidentally arched the battery and now the fuel pump won’t prime or even turn on unless we put power directly to the fuel pump itself. We checked the power to all the fuses and they have power we’re just not getting power to the back part of the truck now. What else can I do to try to troubleshoot the problem.

Thanks ,
Ramiro

[gmc684x4]

Look at all fuses sounds like a popped fuse
I am going to say what ever fuse that controls fuel pump relay is blown

[Ramiro0727]

Originally Posted by gmc684x4

Look at all fuses sounds like a popped fuse
I am going to say what ever fuse that controls fuel pump relay is blown

gmcc684x4 I checked every fuse with a test light. No fuses are blown. The ECM wouldn't be blown would it?

[gmc684x4]

possibly ecm

Did you check both fuse panels the one under the dash as well as the one under the hood ? are there added fuse holders by the battery to check as well

The main fusible link will be easy to test check if you have 12 volts to the big alternator wire

[rayce88]

Check the Fuel pump relay ?

[Ramiro0727]

Originally Posted by rayce88

Check the Fuel pump relay ?

rayce88, i checked the fuel pump relay and it did have 12 volts to it. all fuses were good.

[Ramiro0727]

Originally Posted by gmc684x4

possibly ecm

Did you check both fuse panels the one under the dash as well as the one under the hood ? are there added fuse holders by the battery to check as well

The main fusible link will be easy to test check if you have 12 volts to the big alternator wire

gmc684x4 i will check the alternator wire for 12 volts.