I am going to be droping a CAI into my protege soon, and all the tutorials I have read say to disconnect the neg. battery terminal to clear the ECU overnight. Well, I have no problem with that, but then it occurred to me, the odometer is powered. I wondered if disconnecting the battery is going to clear the odometer? that wouldn't be good. But then again, why would the mazda designers make it so that every time someone had to replace their battery, the odo died. I don't think they would.
So, my question is, How is the odometer powered?
So, my question is, How is the odometer powered?
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