[AT] How to test a fuel gauge/Sender??--Rickey

Phil Auten pga2 at hot1.net
Tue Sep 14 18:51:19 PDT 2004


Walt,
I've made my living by troubleshooting electrical and electronic circuits 
for the
last 35 plus years. I've never encountered every possible design for a fuel 
gauge
during that time. Since, at this point, I don't know which part of the 
circuit is
causing the problem, I don't want to induce another problem into the mix by
destroying the gauge itself with excessive current. I can always apply more
current if it's needed, but it's gonna be tough to get inside that meter 
movement
to repair that little wire if I burn it out.
The gauges you are familiar with may connect directly to a 6V or 12V source,
but what is the resistance in series with them that is provided by the 
sending unit
when the needle is fully deflected?
There's a lot more to this than is readily apparent. Unless you have a 
schematic
of the circuit, I find it best to proceed with caution.

Phil


>>PHIL.
>>Do you have resisters  inline with the gauges on your equipment and run them
>>on low 1.5 voltage. All  the gauges on mine hookup directly to the battery
>>voltage 6 or 12 volts with 14  or 12 gauge wire. I wonder if you are 
>>correct why
>>they don't burn out on the  vehicle.
>>
>>Walt Davies
>>Cooper Hollow Farm
>>Monmouth, OR 97361
>>503  623-0460
>>
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