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Old 06-11-2010, 10:30 PM
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TIMZTOY TIMZTOY is offline
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Join Date: Apr 2009
Location: Denver
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If it's all electric. The gauge should be a risistor type gauge. As the pressure rises the ristance lessens. (I think) with it off the car you could try hooking up the ohm meeter. And move the needel. The risistance should change. If it's oil. Don't know other than check the oil line

all that info is general electrical test. Nothing to do spasfically with 40's
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