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 |
stugray |
Mar 28 2014, 09:45 PM
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#2
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
The website agrees with timothy_nd28 that the sender should read 0 Ohms when empty.
This is exactly the same as grounding the sense wire to the car GND. So without the sender in the picture at all, what does it read if you hook: +12V to +12V GND to GND Sense to GND It should read empty. Unhook the sense wire (open) and it should read Full. If the gauge does not do that it is broken or the description of the unit from the website is wrong. |
john77 |
Mar 28 2014, 10:31 PM
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#3
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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 |
The website agrees with timothy_nd28 that the sender should read 0 Ohms when empty. This is exactly the same as grounding the sense wire to the car GND. So without the sender in the picture at all, what does it read if you hook: +12V to +12V GND to GND Sense to GND It should read empty. Unhook the sense wire (open) and it should read Full. If the gauge does not do that it is broken or the description of the unit from the website is wrong. It does nothing in either of those scenarios. So yes, the gauge is now also broken. |
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