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use a digital meter & check for voltage on wire at sending unit with wire disconnected. if no voltage it is possible the guage may be open circuit or has no power from ign. sw. or printed board at back of cluster is bad. I memory serves me right the way it works is low resistance-low reading, high res.-high reading(open circuit). will double check later this morn.
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Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card
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