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gas guage problems

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Old Apr 15, 2008 | 12:54 PM
  #1  
bigern26's Avatar
bigern26
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From: NW Wisconsin
gas guage problems

Hi all,
Im helping a friend of mine try to fix his truck. its a 1987 Ford F-250 with dual tanks. The front tank wont work even after putting in 3 different used sending units and 1 new sending unit. And the rear tank the guage will read full when there is any gas in it and empty when its starting to run out.
Would this be a wiring issue?
I do have a multimeter but I am not sure on how to hook it up or use it to help us find the problem.
His truck has the 5 wire? plugs for the sending unit. what are each of the wires for?
Any help would be greatly appereciated!!
Thanks
 
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Old Apr 15, 2008 | 09:24 PM
  #2  
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crestfallinman
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From: Bethel Park, Pa
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i have a single tank and mine also reads wayyyy past full

its either a broken wire or bad connection, a stuck float or bad sending unit

i have yet to figure this out
 
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Old Apr 15, 2008 | 10:14 PM
  #3  
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winfordr
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From: Rural Florida Panhandle
The sending unit is a solid-state type (not wirewound as in the past), and can be cleaned to make it work if you want to remove the tank to do it.
Troubleshooting Fuel Tank, Fuel Pump, Fuel Gauge Problems with Ford F-150 with in-tank pumps
 
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Old Apr 15, 2008 | 11:54 PM
  #4  
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bigern26
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From: NW Wisconsin
with all the different sending units we have put in his truck i dont think the problem is a dirty sending unit.
 
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Old Apr 17, 2008 | 07:25 PM
  #5  
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bigern26
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From: NW Wisconsin
anybody else?????????
 
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