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Discussion Starter #1
not a bronco but a ford :) yea the other truck....
on my 89 f-150. i got 2 gas tanks.....the switch is not working......except on 1...i looked under there and it doesnt look like there are ay electrical wires coming from the fuel pump.....so is it a valve ? just wondering how to get that switch working....and no fuses blow in the fuse panel.....thatnks
 

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Ex Navy Nuke
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5,420 Posts
When you switch tanks the pump in the other tank comes on causing the dual function pressure resevoir to switch from the discharge pressure). More than likely the problem is the in-tank pump for the tank not working. The problem could be the DFPR but see if the in-tank pump is working first.
 

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Ex Navy Nuke
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5,420 Posts
The switch might be working and the problem might be that the in-tank pump in the front tank is what's bad. Switch it to front and see if the front tank pump comes on, if it doesn't then see if it has voltage. If it has voltage but doesn't come on then the pump is bad. That is diagnosing.
 
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