I have no power at the feul pump on a 1999 Chevy Silverado. Checked all the fuses, they are good. Is there possibly an inline fuseable link somewhere going to the feul pump???

I would check voltages on the connector attached to the back of the radio. It is possible there is another inline fuse there, or a problem somewhere in the wiring harness.

Hi Ktyson,

Hope you will not be offended but this sounds like possibly a poor maintenance issue. Filters can seriously damage performance and consumption on most engines. Might be good to have them checked out or if you air capable change them yourself. Good Luck,


Jack:}

Yes, it can be the relay. What I do is unplug the relay and swap it gor yhe horn relay. If this doesn't work, I use a volt/ohmmeter to probe the relay socket. Doing this, I can usually find the problem. With the key on , there should be two terminals in the socket that have battery voltage and one that is grounded. The last terminal goes to the pump and should show low ohms to ground. In your truck, the relay coil is connected to ground and turned on by the ecm with a positive signal. It also seems to depend on the oil pressure switch, so you might want to temporarily bypass the switch with a paper clip in the connector to see if that is keeeping the pump from running.

i don' think that there is a fuseable link,the problem could be the reversing lights switch or a problem somewhere in the wiring......cheers

take socket out and on the bottom is a wire link from the + connection to the middle connection on the socket and they break internally under the insulation as they can only handle about 10 amp and a power air pump or ciggy lighter uses more power than this

You didn't post an engine size but you are correct in thinking there is a fusible link that blew when you grounded the orange wire but there is also an inline fuse that protects the oil pressure switch and the fuel pump relay. It is usually located on the firewall.

You can check the fusible links near the starter for continuity. If one of them is burnt up start there by replacing it. If none of them are bad you will need to find the inline fuse. At least the 3.3 liter engine is set up this way.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

I am looking at alldata , the schematics for the fuel system. I see a fuse in the fuse block(10 amp) that comes from the fuel pump relay to the pump. I see a fuseable link (link H)that goes through a oil pressure sending unit. I would get a test light and test the oil pressure sending unit, the inline fuseable link and the relay. If still no power check the connection at the pump and then work backwards testing the harness.

im not sure of the color wires that should be powered but have you checked the fuel pump relay under the hood? also check that you have a good ground at the pump dont check just the positive voltage check for negative (ground) also

fuseable links and inline fuses?

You have a short to ground.What that means is,you have a power wire...............that is grounding on the vehicle somewhere,or possibly back in the fuel pump.The fuel pump theoretically could be shorted internally causing the problem.It also could be a wire or wires back where you were working possibly got pinched.Disconnect negative battery terminal until problem is solved.