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· Registered
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you need to purchase a new negative battery wire from toyota, they are only about 20-30 dollars to replace and will help your electrical system, the engine might not be suffeciently ground to the battery and the car.

To replace:

make sure the car is cool (or else you will burn the shit out of your arm)
disconnect the negative cable from the battery
disconnect the little wire that connects to the side of the body.
then take a deep well 14mm i beleive and follow the wire to the stud on the engine block remove it
reverse to install
If you would like to make it even easier on yourself you can completely remove the battery from the car to put it on.
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