strictly speaking the fuel gauge measures current.  ;-)

Leslie.

--------------------------------------------
On Sat, 4/4/15, Wally Bryant via CnC-List <cnc-list@cnc-list.com> wrote:

 Subject: Re: Stus-List Problem with 2 new fuel gauges...long story
 To: cnc-list@cnc-list.com
 Date: Saturday, April 4, 2015, 4:07 PM
 
 I thought they were Ohm
 meters. Anyway, I just Googled it to make sure, 
 and see a ton of pages on testing marine fuel
 sender resistance.
 
 Wal
 
 you wrote:
 > I agree with
 your diagnosis.  It's gotta be reversed polarity...of
 the
 > sense and gnd.  Fundamentally the
 fuel gages are just voltage meters.  They
 > respond proportionally to the voltage drop
 across the variable resistance
 > in the
 sender.  I would disconnect the leads and use an ohm meter
 to
 > measure and validate the resistance
 of the senders.  Switching the polarity
 > of the sense and gnd monetarily probably
 won't break anything.  Before
 >
 doing so validate that your wiring looks like the attached
 picture.
 
 
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