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I can try that but, will the transfer pump run with both tanks full ?
Should i first siphon 5-10 gals out of the front tank???
I don't think there is a pump in the rear tank. The rear tank has a brand new sending unit in it.
When I turn the key on (w/o turning the engine over) I can hear the pump ( that i believe is in th efront tank)run for a couple seconds. then it stops
The way i understand the written description is: Main fuel pump/sending unit is in the front (or main ) tank. Then there is a transfer pump to tranfer fuel from the rear (or aux )
tank to the front tank. The transfer pump is not in the rear tank, it's on the frame rail between the 2 tanks. are you saying there is another pump in the rear tank that is not part of the sending unit ?
OK We got the gauge working-- Transfer pump still not working- we have a new module ( fuel pump balance module). The transfer pump is getting between 6 & 7 Volts w/ the old or the new module-- the gauge came back on with a bad fuse we found (ing E) we have a new transfer pump and it doesn't apper to work either. when we turn the key on the power to the transfer pump only last a couple seconds-- with the truck running it stays on-- we partially emptied the front (main ) tank. are we getting the right voltage ? do we maybe have a new defective pump ?
OK so why do you think i am only getting 6-7 volts? Also I can't tell on the diagrem where it says 12 volts. the pump only has 2 wires so i should be able to activate the pump using the trucks battery--Right? I tried to run the pump directly off the battery and it did not do anything (unless it's really really quite, i even held it to my ear)
so I'm guessing the new pump Napa sent out is defective. What would account for the reduced voltage at the pump ?? relay-- bad wire ??? where do you think i should check first ?