View Full Version : I don’t get it…what do you think.

10-30-2006, 10:48 AM
So Bruce and I were changing the pump/sending unit in the Ford as I cheeped out and put in a used one a few months back and the gas gauge quit shortly after it was installed[27]

Here is the part I don’t get. With the new pump sending unit out of the tank and hooked up we put some gas in a bucket so that we would not run the pump dry and did a test. The lifting up the level did not register on the dash. CRAP we thought there must be a problem in the wiring somewhere. We put it all back together and for some strange reason it works.

There are three wires inside the tank. Power, ground, and sending. There are four wires to the outside of the sending unit and the fourth wire we thought was another ground.

Why would it not work when we tested it outside of the tank?

10-30-2006, 11:09 AM
maybe the tank also needed to be grounded.

10-30-2006, 03:01 PM
maybe the tank also needed to be grounded.[stupid] .....................................

10-30-2006, 03:14 PM
The tank is plastic and is not grounded by any strap or anything attached to the sender unit

10-30-2006, 03:45 PM
Well you first problem was having that Bruce guy helping you out!!![15]

10-30-2006, 04:55 PM
and your second problem woulda been the amount of beer ingested by the two of you

10-30-2006, 05:05 PM
what happens when you unhook the 4th wire..... the one u thought was another ground?

10-31-2006, 08:10 AM
[15] [15] Who cares, it works. Just another one of those wonders of the world.....[15] [15] [15] [15] [15] [15]

11-01-2006, 09:16 PM
Did you check for a bad connection where the wires go through the top of the fuel pump/sending unit? Had an Explorer we put a couple of fuel pumps into, would be good for a couple of months, then die again. Finally found it by wiggling the wires right on top of the tank with the key on and ground out the fuel test lead at the DLC (pre '95). In your case, have someone watch the guage while wiggling. Worth a shot. You can test the sending unit with an ohm meter, should be between 10 and 160ohms depending on fuel level.