Auto diagnostics

The best way to Cease a Vehicle Engine 1Pull the hood release take care of inside the car or truck Auto diagnostics.2Open the hood of the car to expose the engine.

3Pull all of the spark plug wires off the spark plugs. Most cars have either a four- or six-cylinder engine block, so you are going to pull off 4 to six spark plug wires (the only wires connecting to spark plugs on each side with the engine) automotive diagnostic tool.

4Use a wrench to unscrew the red battery cable from the good battery terminal. Then unscrew the black battery cable from the unfavorable battery terminal.