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Originally Posted by Gerrick
Ok, checked the battery myself. It reads 12.53V. I thought it should be 12.6 to 12.8..? Anyways, I really don't know how to check the voltage drop anywhere else with the meter so if you'd be so kind to give me a pointer on how to use the meter and where to check it...do i disconnect the cables?...yes I'm a newbie but I do read! I'll be checking the web to see how if none replies fast.
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If this was with the ignition off, then your battery is at least partially discharged. Should be 12.7 to 12.9V at 70 degrees. Toyota says to charge the battery if it is outside this range.
You are getting a significant drop in voltage with the ignition on also. This may also point to a very discharged battery.