having an intermittent problem with santa fe causing no start, has no ground at fuel pump relay when not starting, if i cross relay terminals to power fuel pump it starts no problem, any one have a diagram for , thanks

 

Have heard that Hyundai uses ground side to control relays and switches.
Meaning is that the control side of the relay is controlled by the ECU by providing ground
By passing the control and jumping the relay to power the fuel pump means to start engine,
There is no problem with the fuel pump.
The crankshaft sensor is working because if it was not then there would be no spark and engine would not start at all.

So, what does it mean??
Control side issue.
The ECU ground may have an issue??
The wiring to the ECU is frayed or shorted/opened??
The ECU isn't getting the signal to turn on fuel pump??

I am sorry. I do not have a diagram of the circuit in question.

 

We cannot always get a diagram and worse a lot of them don't agree with the vehicle we are working on.

It may take a little more time , but what you might do is ,
note the color of the wire under the fuel pump relay that supplies the ground and since we know the ground comes from the ECM locate that wire at the ECM plug and confirm it is not broken or possibly corroded at the plug.
If OK you have worked your way to the ECM. They use several ground sources and it would be a good move to remove and clean all the grounds you can find.
A good part of the time this will solve the problem.