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Old 11-30-2010, 09:47 AM   #1
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Propane tank gauge question

The gauge on my 100lb propane tank has two wires. The purple wire is connected and the green wire looks like it needs to be connected but is not. Everything seems to work fine and the gauge is showing the level. Should I re-connect the green wire to the second gauge connector? I am guessing it worked loose but would like to be safe and know what the wire does.
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Old 11-30-2010, 02:54 PM   #2
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The second wire is the ground. The reason the gauge still works with the ground detached is the gauge is probably grounded through its housing into the tank, which in turn is attached to the vehicle frame.

My ground wire is held to the bracket that protects the gauge with a sheet metal screw. Your screw probably worked its way loose and fell out.
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Old 12-02-2010, 09:56 AM   #3
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Old 12-02-2010, 11:28 AM   #4
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Connect it..
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Old 12-02-2010, 11:32 AM   #5
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I'd reconnect it if it were mine, it might prevent a non readable condition in the future.
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Old 12-02-2010, 12:58 PM   #6
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I Agree as My friends parents and family and teachers would say and co workers if it not Broken don't fix it...lol...
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Old 12-02-2010, 01:39 PM   #7
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I agree with paz, the gauge is grounded through the housing. You can test this with an ohm meter, put one lead to the end of the green wire and the other to ground. If the reading you get is zero or very close to zero it's a ground.
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Old 12-03-2010, 11:23 AM   #8
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Quote:
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I agree with paz, the gauge is grounded through the housing. You can test this with an ohm meter, put one lead to the end of the green wire and the other to ground. If the reading you get is zero or very close to zero it's a ground.
You are right, it was simply a ground. Tested continuity with the frame.(should have known, the wire is green dummy) Thanks to everyone for the help!!
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