For what it's worth, the tach on my 2003 would periodically stop working. It always recovered, usually after we stopped and restarted the engine--root cause-- could have been the start of an VCM issue--don't know. Maybe after 18 years and almost 200k miles..it just got tired once in a while????
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Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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