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Old 03-01-2013, 09:32 AM
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This is what I was meaning..
The fuel sender does produces an (ohm signal). But It is not a 12 volt source, “hot” lead as that could lead to an explosive condition!

So what I was trying to post here was to NOT run a (12 volt source) to the sender unit..

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  #17 (permalink)  
Old 03-01-2013, 09:56 AM
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There is no ohm-signal - the resistance in the sender (ohms) reduces the voltage that flows through the sender, and therefore through the gauge. When the sender registers 0 ohms (full or empty depending on the sender), there will be 12 volts coming through the sender and to the gauge. There is no explosion because there is no spark - just like when there is an in-tank fuel pump. They draw a full 12 volts and depending on the unit, a fair number of amps. No spark, no explosion.
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Old 03-01-2013, 05:32 PM
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Thanks for putting out the correct information, I had given up.
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Old 03-02-2013, 06:21 AM
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Sedan is correct....... no arc or sparks........ no explosion. That is the reason marine alt, starters etc.... cost so much, they have to seal them up.
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