Fuel Pump Electrical/help

[PS89YJ]

My 89 YJ has the 95 mopar fuel injection. In the process of going to a 20 gallon tank I have lost the power to the pump, worked fine before pulling the tank. The positive lead has been traced to a relay, I popped a new in to see if it was bad with no joy. I'm at a loss as to why there is no power, is there a safety shut off if there is no fuel pressure or another reason? Any help is sure welcome.

 

[Saddle Tramp]

Stab in the dark here but with the 20 gallon tank is the fuel pick up submersed in gas? The 20 gallon version is deeper than stock.

 

[PS89YJ]

I don't even have the pump connected just checked the leads. I'm going to hook up the pump and put gas in the tank today. I'm hoping there is a no pressure cut off somewhere in the circuit. The tank has the correct internal pump. Has anyone run out of gas, do I need to prime the system like a diesel? Thanks for the help.

 

[Gennybro]

I ran my jeep out if gas on purpose about a week ago,was going to change the gas gauge sending unit. Didnt get around to doing it and I needed the jeep.Put a couple of gallons of gas in it, had no problem starting it up.

 

[PS89YJ]

I put gas in the tank hooked up the pump and it started right up. Must be a no/low pressure cut off which cuts the electricity to the pump and thank you it does not need to be primed.