I have a 420 SEL that has developed a non-operative tachometer reading. All of a sudden rpm did not read, its always on "o". Anyone out there knows how to fix this problem. Thank you......
I have a 420 SEL that has developed a non-operative tachometer reading. All of a sudden rpm did not read, its always on "o". Anyone out there knows how to fix this problem. Thank you......
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