Fuel gauge still not working, What am I missing? |
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Fuel gauge still not working, What am I missing? |
john77 |
Mar 27 2014, 02:24 AM
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#1
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Senior Member Group: Members Posts: 621 Joined: 21-February 14 From: Los Angeles Member No.: 17,027 Region Association: Southern California |
With the ignition on the needle on the gauge lifts to E but goes no further despite the tank being full.
I pulled the sender, wired up a new ground and hooked up a new wire from the gauge to the sender and tested the sender manually by turning it upside down and then back. The needle goes from empty to full and back to empty. Just to double check I test the resistance, 0.2 ohms right side up, 89.9 ohms upside down (the range is 0-90 ohms). So I put the sender back in the tank with the new wiring, switch on the ignition and... the needle rises to E and goes no further. So I think maybe, somehow, the floats not lifting. So I pull the sender, fill a bucket of water, dip it in, and the needle on the gauge rises and tells me I have half a tank - or less or more depending how much I submerge it. In other words, the damn thing is working. So I put it back in the tank and nothing, the gauge rises to E and stays!!! What the hell am I missing here? It works in a bucket of water but move it a foot and put it in my gas tank and nothing. John |
timothy_nd28 |
Mar 28 2014, 09:11 AM
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#2
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
That test is almost correct. You jumped out the S to G on the back of the fuel gauge, but you need to have another wire that ties both of them to ground or a brown wire in your dash.
This test was to simulate a 0 ohm condition, and according to the spec of this gauge the needle should of went to empty. I just wanted to confirm that 0 ohms is empty and 90 ohms is full. It seems backwards to me, and that test you did would of verified that. Another test you can do.. Pull both wires off the sender and ohm each terminal to one of the screws that holds the sender down. |
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