Question about Cars & Trucks
The sending unit on my dodge ram d-150 pick up has no electrical wires running to it, so my fuel gauge is showing empty, i need a wiring diagram so i know where to re wire the hot and te ground for the fuel sending unit. please help! thank you!
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Posted on Jan 02, 2017
Hi, sounds like you have checked everything properly and you have a bad tank sender, current when checked with test lamp should pulsate.I suggest replace fuel tank sender.
Posted on Dec 01, 2008
SOURCE: i have a 1988 F-150
i have the same problem and i replaced the shuttle valve and i fixed the problem it is located on the drivers side frame rail just behind the the main high pressure fuel pump it should have 6 lines going into it and out it is a mechanical part so its not repairiable hope this helps
Posted on Mar 31, 2009
Well that tells me that someone installed the wrong fuel level sensor. Your going to have to drop the tank and pull the pump and float assymbly out. Then go to a parts store and get a sending unit that has the opposite resistance of that sending unit. Just wait until the tank is empty so its a lot lighter. You can call the parts store or go down and see if there is multiple sending units. The sending units work by resistance, when the tank is full the float moves up and turns a wheel in the sending unit, which either removes or increases the resistance causing the gauge to lower. The sending units either give full resistance at full or no resistance at full and then changes as the level goes down until it does the opposite at empty.
Posted on Jul 17, 2009
SOURCE: fuel gauge stuck on full
The fuel sending unit in the tank is broken. It acts as a variable resistor that tells your gauge what level the tank is at. When you remove the pos. lead it shows infinite ohms. and when you short it to ground it shows 0 ohms.
Posted on Jul 28, 2009
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It sounds like a problem with the fuel gauge sender unit in the fuel tank which has worn out and gone open circuit and needs replacing. Access to the unit is usually through a removable plate in the floor in the rear of the vehicle. Disconnect the wiring connector and any hoses and then remove the securing screws. Replacement is done by reversing procedure.
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