Fuel pump is not powering up on an 89 suburban have chased wire all the way back to relay where does it go from here?

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8038ebc7 Here's a guide,read about fuel pump.Click on link.

The relay should have a fuse located under the hood or possibly in the cab. If fuse is good trace your wiring and inspect it and look for bad or dirty connections.

Hi, there is a grey wire that comes from the fuel pump relay, to the pump. This wire must have power while cranking, and running. If you have power, you need to check groung at the pump. If you have power, and ground, and your connection at the pump, and sending unit are good, then you may have a faulty pump. Good luck...Coop

You could always run a fused wire from the fuse panel to the relay. This way when you turn the key, power goes to the accessory on the fuse panel, the fused wire you installed, and to the relay circumventing the problem and creating a protected circuit.

if you have power at the fuel pump relay than you have to chase the wires to the back,somewhere is a problem look for areas where wires would chafe or get pinched also pull apart any plugs you see many times water gets in and corrodes the pins,you will find it.

The oil pressure gauge on the engine runs the fuel pump until the engine receives full oil PSI and shuts off. Upon that time the relay takes over for the fuel pump

Fuel Pump Relay Circuit...
There is an Oil pressure switch in this circuit that disallows the relay to complete the power supply to the fuel pump. It is for safety purposes , it senses engine oil pressure upon cranking of the engine and then completes the ground circuit to close the relay sending voltage to the fuel pump at start up, and also functions as an engine kill if you loose oil pressure opening the ground circuit which in turn opens the contacts in the relay shutting off the power to the fuel pump.... Invest in a vehicle specific repair manual with wire diagrams... hope this helps..

You should find it under the hood in a fuse box near the firewall

the relay and fuse are in the power distribution box under the hood. as far a by pass you still can use an aftermarket electric pump ,however the cost will be about the same as re3moving the old pump in the tank if that is the cause in the first place. if all you need is the relay replaced then i'm sure that the pump is still good. if the pump is bad then make sure if you by pass the in tank pump that the new under hood electric pump has enough pressure to give the needed gpm(gallons per minute) required for your system and that if wired into the current fuel circuit that you dissconnect the wire harness to your tank pump

Check the timing chain..Take the belt of and turn the crank by hand and see how much slop there is when you turn it back and forth..If theres not much then there could be a cam problem.But most of the time its the timing chain..Hope this helps you and have a great night....

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