Testing gauges?

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PITT40

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Can you test the fuel and temp gauges? Is putting 12v to them to see if the needles move suitable?
 
Hold on

There is a voltage stabilizer that reduces voltage to the gauges, I think lowering the working current to cluster of gauges. I want to say 7.5 volts or something big red shop manual book can help.
 
OK, but for testing can I just touch a positive 12v to one terminal and a ground to the other to see that the needles move? I haven't tried it because I don't want to damage them.
 
It shouldn't damage the gauge but WILL make it read high. Probably a good enough indicator that it isn't dead though.
The voltage stabilizer outputs 10 volts
 
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