Wait a minute while I clean my contacts!

I guess so since you already did

Heh there, what do y'all think of my pic?

I am pretty sure it's not that considering i am 7 months pregnant, although you could argue hormones. But.. im just sayin.

Gee, Shasta1, I didn't know that you, too, were here hiding from the Alien Task Force. Where did you get the great human costume?

First of all is it manual or electric tank switching? If it is electric chances are that the switchover valve is bad. Use a multitester to make sure it isn't the switch has gone bad first. Now if it is a manually actuated valve check to make sure the linkage is hooked up and working. If the vale actuates but you get no fuel you got a plugged fuel line more than likely. Look for a crimped fuel line too. My money is a plugged strainer in the tank or possibly dirt and or corrosion in the line. If you are getting "red" in your fuel filter you need to check your tank and lines for water borne corrosion. Dual tanks can have a problem occur in that fuel can stay in the tank a long time before being used. Condensate can take over when the tank is left empty for long periods of time too. Water will bead on the inside when it gets cold enough and gets trapped under any gasoline left in the tank. It only takes a little water at a time to initiate corrosion in the fuel lines. One way to prevent this is to every once in a while toss a quart or two of Alcohol in the fuel to a full tank. Water and Alcohol mix, so does gasoline and alcohol. Drive the tank dry almost and hit with a full tank and a repeat treatment and you have dealt with the problem.

I have seen this before in dual tank trucks and have had to replace fuel lines clogged with rust before. I have also had to replace a couple of secondary fuel tanks in my time for corrosion problems.

Now this is an outside chance too. For a period of time Ford had the brilliant idea of using dual fuel filters off of each tank in some of their trucks. If you have one of these go for the secondary fuel filter first to see if it is clogged.

PLEASE MAKE SURE YOU PULL THE GAS CAP OFF OF BOTH FUEL TANKS BEFORE SERVICING! They can actually pressurize themselves and you get the never ending flow of fuel from the tank becasue of that. Info offered on the Just in case thing.

If you got a compressor you can also blow backwards on the fuel line to possibly remove the obstruction but make sure you do it at a point where you cannot jack up a mechanical fuel pump.

Question 1. When the gas gage shows at the beginning of the red, go fill it up. If the owner's manual says it has a twenty gallon tank and you just put 18 gallons in it, you know it has two gallons in the red (it is probably more like four or five.)

Some tank valves are electric and some are manual. If yours is electric and you have a switch on the dash, go check the fuse. If the valve solenoid gets a little "sticky" it can blow the fuse. If so, replace the fuse and hit the valve with a squirt of WD40.