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hour meter starts working when it gets a tach pulse,only runs when engine is running

did you buy the ones that was on gl about 2 weeks ago?

yes the 2nd red wire is for lights,i connected a brown to it and went to gauge cluster

since i searched the internet for almost 4 hours and could not find complete instructions on installing this tachometer i thought i would post my install the tach is a military issue tach made by dixson for the hmmwv.it is a 3500 rpm with an hour meter and light and does not have a pre wired...