I have a 2005 Thor Fun Hauler 27′ toyhauler. I bought it used a couple weeks ago and am trying to get the fuel pump to run. Apparently, the previous owners didnt use the fuel station ever. My issue is I cant get the pump to come on. The switch is turned on in the trailer and on the pump and there is power at the switch. The fuse is fine. Directly connecting a battery to the pump will make the pump run so something is buggered between the pump and switch as there is no power at the pump.

One question i do have though is do you need to have fuel in the tank for the pump to run? The tank is bone dry and im not sure if the fuel level sensor needs fuel in the tank to "switch" power to the pump as some sort of safety mechanism? Any ideas?