1985 F250, fuel delivery problem
#11
Good point, thanks. I dropped the tank today and it was surprisingly clean and the fuel sending unit looks nice but doesn't work. I measured the voltage that is being applied to the pump inside the tank when the rear tank is selected at 11.5 volts, I think there is a small voltage drop across the contacts of the relay, inertia switch and tank selector switch. I attached the pump directly to the battery, and it doesn't run. I also verified that when I manually move the float to the full position, the gauge reads empty, and when I move it to the empty position, it reads full. This is pretty odd, since both tanks operate this way.....
#12
Well, looks like someone put the wrong sender unit in, as described in this thread;
https://www.ford-trucks.com/forums/1...backwards.html
So, should be an easy fix, I needed to replace the sender unit anyways.
https://www.ford-trucks.com/forums/1...backwards.html
So, should be an easy fix, I needed to replace the sender unit anyways.
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