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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck




 
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Old 08-26-2010, 03:54 PM
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fuel tank selector switch?

does anyone know witch way the switch goes to let you know witch tank your using, any pics i could look at, or is there a face plate? i have two swtiches one on the dash, but ive been told that is just for the gauge, and then the other one buy the seat, and idk witch way it goes. any help would be good!
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Old 08-26-2010, 11:14 PM
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well after tinkering on it for a while i decided to take off the valve and just hook up the main tank straight to the fuel filter and hope the gauge works like that. if it does i just might leave it as one tank and try and take out the other one
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Old 08-26-2010, 11:44 PM
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Tank Switch Diagram

for heaven sakes, dont do what the past owners of my 68 f250 ranger camper special did. If something didnt work they tore it out. tank behind the seat... torn out, wind shiels wiper tank and pump... torn out. I will go look and tell you what it what, one sec... ok, with he handle pointing forward and the little pointy arrow pointing backwards, it is on the main under bed tank. there is a plaque on mine too. Draw a square. at the top left write aux. top right write off. and bottom left write main. that is what mine sayes, but the writing is looks upside down if you are standing by the door. so rotate it 180 deg from normal reading position. (like you are reading a book upside down) have I confused you yet?
Here this may help... I hope it answers what you were asking.

DOOR

--------------------------------
| AUX OFF |
| |
| |
| |
| <-O-(=======) | <-- handle is this side
| |
| |
| |
| MAIN |
--------------------------------

SEAT
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Old 08-26-2010, 11:54 PM
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Second try at diagram


............................DOOR.................. ..........

________________________________________
|................................................. .............|
|....AUX........................................OF F.......|
|................................................. .............|
|................................................. .............|
|................................................. .............|
|.........................<--O(============).......|<--- Handle on this side
|................................................. .............| for main under bed
|................................................. .............| tank.
|................................................. .............|
|.....MAIN........................................ ..........|
|................................................. .............|


..............................SEAT................ ............
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Old 08-27-2010, 12:11 PM
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Quote:
Originally Posted by muddymatt View Post
for heaven sakes, dont do what the past owners of my 68 f250 ranger camper special did. If something didnt work they tore it out. tank behind the seat... torn out, wind shiels wiper tank and pump... torn out. I will go look and tell you what it what, one sec... ok, with he handle pointing forward and the little pointy arrow pointing backwards, it is on the main under bed tank. there is a plaque on mine too. Draw a square. at the top left write aux. top right write off. and bottom left write main. that is what mine sayes, but the writing is looks upside down if you are standing by the door. so rotate it 180 deg from normal reading position. (like you are reading a book upside down) have I confused you yet?
Here this may help... I hope it answers what you were asking.

DOOR

--------------------------------
| AUX OFF |
| |
| |
| |
| <-O-(=======) | <-- handle is this side
| |
| |
| |
| MAIN |
--------------------------------

SEAT
yea that helped thanks. ive taken out the switch for now and going to replace it and the metal hoses. as for taring out my past owner took out the wiper fluid as well. i think my tank may have been a dealer add on they had to cut a piece out of the bed and covered it with this metal thing that makes the bed look weird.
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Old 08-27-2010, 02:19 PM
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The tank behind the seat is the main tank, the tank under the bed is the aux. tank.

I got tired of not being able to switch tanks while driving (just couldn't get my arm down there and turn the valve with the door closed) and switched to a solenoid valve operated by a toggle on the dash:

BWD FSV1 - Fuel Tank Selector Valve | O'Reilly Auto Parts

Easy to install, even easier to operate.
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Old 08-27-2010, 02:52 PM
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i have a switch under the dash, i thought was an add on, but im thinking it was always there, do any of you guys have a switch that says main and aux on the dash and another switch on the floor.
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Old 08-27-2010, 04:01 PM
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Yes, the switch under the dash is just for selecting the appropriate sending unit for the gauge, and the actual tank selector valve is the mechanical floor-mounted valve. So switching tanks requires you to turn that floor valve, and flip the dash switch over so that you can read the fuel level for the appropriate tank.
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Old 08-28-2010, 05:13 AM
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Don't know if you want new or retrofit, I had a 79 van with a factory dash switch only that controlled the tank selection and gauge reading.



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Old 06-29-2012, 09:17 AM
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I want that

Quote:
Originally Posted by TigerDan View Post
The tank behind the seat is the main tank, the tank under the bed is the aux. tank.

I got tired of not being able to switch tanks while driving (just couldn't get my arm down there and turn the valve with the door closed) and switched to a solenoid valve operated by a toggle on the dash:

BWD FSV1 - Fuel Tank Selector Valve | O'Reilly Auto Parts

Easy to install, even easier to operate.
I would love to know more about that switch. Can you give me some details? I'm new to this whole thing. I have a 72 sport custom.
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Old 06-29-2012, 11:02 AM
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I see that the link I provided two years ago is longer good, so here's another one, from Autozone:

Click the image to open in full size.

Duralast/Universal 3 port fuel selector valve used with SW48 toggle switch (FSV4) | Fuel Tank Selector Valve | AutoZone.com

As you can see, the valve has two input ports (one for each tank) and one output to the fuel pump. With the power to the valve turned off, it routes the fuel from one tank to the fuel pump (I chose this to be the main tank behind the seat.) But flip the switch on the dash and it energizes the solenoid and it now routes the fuel from the other tank (aux.) to the fuel pump. You can choose whichever tank you like as your primary tank. Be sure to use a power source that's keyed to the ignition switch, otherwise if you shut the engine off with the switch to the solenoid in the on position, power will still be going to the solenoid to hold it open for no need. I don't believe there's a lot of draw, but it could drain your battery over time if you leave it parked for a while.

It says the switch comes with instructions so I suppose all that's covered in there...
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Old 06-29-2012, 02:57 PM
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1967/74 F100/350's have a manually operated fuel tank selector valve on the floor adjacent to the drivers side of the seat.

1967/72 only: To the left of the steering column, below the dash, mounted to a bracket is a toggle switch that only changes the dash fuel gauge from the in-cab tank to the auxillary tank..

The switch bezel is market L FUEL TANK R
-----------------------------------------
1973/74 F100/350: The switch is located in the heater control panel.

1975/79 F100/350's have a electric fuel tank selector valve and solenoid assy (D5TZ-9189-B), mounts on the frame rail.

The switch is located in the heater control panel, switches the gauges and the fuel tanks.
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Old 06-29-2012, 03:10 PM
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...none of which answers either the two-year-old original question or the question just posed about my solenoid valve conversion...but thanks for your input, Bill.
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Old 06-29-2012, 04:43 PM
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Old 04-14-2014, 10:15 PM
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TigerDan, I was wondering where you mounted the new tank selector valve. Mine leaks so I need to replace it but I was just wondering if it would hold up to gravel roads if I mounted under the cab where the old one is. I like the idea of not having to open the door to switch tanks
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Old 04-14-2014, 10:15 PM
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