I put a new unit in. Fuel gauge half way worked on the old one it was unreliable. The new unit gets fuel to the engine no problem. Runs great. However the fuel gauge doesn't even flicker. Sound like a grounding problem? The gauge at least went to half way on the old unit.
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New fuel pump/ sending unit-Fuel gauge inop
- Thread starter Gunny65
- Start date
Most of my time on CK5 is on my Droid phone. It will not let me search. However, I will later.
Anyway, I pulled the ground wire, turned the key on and the fuel needle slowly went to full. I took a small grinding stone to the ground point on the frame and used some silcone (the stuff used on sparg plug wires) on the ground connection and screwed it back down. I again turned the key on and the needle then slowly went back down to just above Empty. I know it doesn't have much fuel in it but I thought it was about a quarter gallon.
Guess I will have to fill it up and find out if it really is almost empty or not functioning correctly.
Anyway, I pulled the ground wire, turned the key on and the fuel needle slowly went to full. I took a small grinding stone to the ground point on the frame and used some silcone (the stuff used on sparg plug wires) on the ground connection and screwed it back down. I again turned the key on and the needle then slowly went back down to just above Empty. I know it doesn't have much fuel in it but I thought it was about a quarter gallon.
Guess I will have to fill it up and find out if it really is almost empty or not functioning correctly.
rampage
3/4 ton status
If you unplug the wire harness for the gas tank (right next to where you found the ground wire) the gray wire is the power to the pump and the purple wire is for the sending unit. If you connect a 12V supply to the gray wire and ground to any metal part, the pump will operate. With this plug you can also check to see if the sending unit is functioning. Attach an ohm meter to the purple wire and ground the other lead and you should get a reading any where between 0 and 90 ohms depending on how much gas is in the tank. Also, you could attach a potentiometer to the male side of this connector and check the functionality of the fuel gauge. Just get a 100 ohm potentiometer from radio shack and sweep it through it's range.
And just an FYI: the 'silicone' you used is actually called dielectric grease. I use it every time I replace a bulb, unplug a wire harness or at any other electrical connection. It prevents corrosion and improves the electrical connection - cheap insurance.
And just an FYI: the 'silicone' you used is actually called dielectric grease. I use it every time I replace a bulb, unplug a wire harness or at any other electrical connection. It prevents corrosion and improves the electrical connection - cheap insurance.
Thanks Rampage. I couldn't remember the name "dieelectric" it was escaping me yesterday. I have an Ohm meter and will test the sender.
I looked for the thread British Slave talked about. I found plenty of information but it is nice to have a straight answer to a question. You never know what situation another person is in or why they asked a question in the first place. Again, thanks.
I looked for the thread British Slave talked about. I found plenty of information but it is nice to have a straight answer to a question. You never know what situation another person is in or why they asked a question in the first place. Again, thanks.
rampage
3/4 ton status
Hmmm, my sending unit must be faulty then. When I had my sending unit out of my tank and lifted the float up and down (simulating the level of the gas in the tank) the rheostat measured between 0 and 90 ohms at this connector. Maybe I should get a refund on my EE degree.
rampage
3/4 ton status
So if he fills the tank up, measures the resistance and then measures it after every trip wouldn't it change as he's draining the gas out of the tank?
British Slave
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I"m going to assume EE is Elecrtical Engineer. If so that and your location would explain a statement like you made.
I'm going to concede it to you and stop trying to help people using hard earned experience and manufacturers procedures. Thank you.
I'm going to concede it to you and stop trying to help people using hard earned experience and manufacturers procedures. Thank you.
rampage
3/4 ton status
Don't know why British slave deleted his last post. You could have used his technique, but while you're gathering up his parts from Wallyworld, Radioshack and what ever other place you had to go, measure the resistance at the plug during your trips - it might take a full tank to get your parts. 
British Slave
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When you get ready to fix it and fix it right, PM me and I will be happy to send you the easy way to diagnose the problem. But if you want to screw around, filing up, driving, and taking a resistance measurement every day for however long it takes you to burn a tank of gas, only to find out the reostat in the tank sending unit works, but the gauge still doesn't work, go for it. Some guy, or his parents, spent a lot of money to get an EE degree says that is how to do it.
rampage
3/4 ton status
For 10 yrs I've been wanting to use the ignore feature on here. Thanks for being at the top of my jackhole list. 
British Slave
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LOL I don't need no stinkin ignore feature, I can just ignore you. Have a great week.
