<VV> Stumped by Gas Gauge

[Frank DuVal]

Yes, 12 volt test light on sender wire with key on should light light. 
But it may be dim, never tried it myself. I always use VOM meter ( DMM 
for you young whippersnappers).

But, the easy test is to just hang the wire in mid air, not connected to 
anything. Turn on key and check reading on gas gage. Now, connect the 
wire to ground. Turn key on and check reading on gas gage.

One way should be beyond empty, the other way beyond full. If no change, 
the wiring or gage is bad. If the gage moved, then the sender is bad. 
Sender should be between 0 and 90 ohms on a late model. Ohms varies with 
level of gas.

You could subtitute a 100 ohm potentiometer for the sending unit and 
check the gage that way.....  Too much trouble....

Frank DuVal

ChiefTAM at aol.com wrote:

>OK, there is about 5 gallons in the tank, maybe now down to 4.  I  thought I 
>remembered that if it was a ground issue, the tank would read empty,  and if 
>it was a sending issue, the tank would read past full.  There was  some stuff 
>on the float unit inside the tank, but it wasn't bad.  The tank  only had some 
>really light surface rust in the upper part of the tank that was  not in the 
>gas, so the float and sender wasn't really covered.  
> 
>I have a 12 volt test light, by placing the point inside the sender  end, 
>with the key on, I should get a light, is that correct?   If I don't, that is 
>ground?  
> 
>I will try some of these suggestions tomorrow and let everyone  know.  Thanks.
> 
>Todd in TX  
>
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