Hi, I have a 1990 Ford F150. Just got it a week ago. 86K original miles. V8. Dual fuel tanks.
Today I emptied a load of wood from the bed of the truck and noticed as I was finishing up that I could hear a faint whine from the rear of the truck. Long story short: Whine from fuel pump. After about 45 minutes, went back out and the fuel pump was STILL running. Tried switching tanks, same thing....high pitched whrrrrr of the fuel pumps. Also, what fuse controls the fuel pump? Tried pulling them all to no avail of shutting it off. Finally, I disconnected the battery so I can get to work tomorrow morning.
Anyone know the problem- i am guessing it's a relay that's bad, and can give me some advice on where on/in the vehicle to locate it so I can bring it to NAPA for a replacement?
thanks very much.