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Old 11-25-2012, 12:03 AM   #5
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Red/green is for the clock. It's just a 12v wire, look for another wire that's hot all the time and splice to it.

The white/blue is simply an output from the cluster to the ecu for the speed sensor. You don't need that wire.

The white wire is for the tachometer. If your truck didn't originally have one, the wire may not be there. Check the ecu and see if there is a white wire on pin 2. If so, splice into it and run it to the cluster.
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