Thread: Tach issues
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Old 07-26-2013, 10:28 PM
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check your harness connections. also make sure to check the condition of your battery cables. with all the electronics we have in our trucks the slightest loose connection can wreak havoc. i have seen on my own truck the negative battery cable had a crack in the casing and was all green and corroded 80% of the wire was broken through. it caused my hazards to flash the high mount brake light and cargo lights and the reverse lights even my dash lights were flashing. but it sounds like you may have either a short in the main dash harness or loose connections somewhere.
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