1 Turn the Headlight Switch to the On position. 2  Set your multimeter to Volts DC mode. 3  Probe the wire that corresponds to the number 13 with the red multimeter lead. 4  You can accomplish this by using a Wire Piercing Probe (To see what this tool looks like, click here: Wire Piercing Probe). Turn the Headlight Switch to the On position. 2  With your multimeter to Volts DC mode: 3  Probe the wire that corresponds to the number 12 with the red multimeter lead. 4  The best way to do this is using a Wire Piercing Probe (To see what this tool looks like, click here: Wire Piercing Probe).
odontoid process. the toothlike projection that rises perpendicularly from the upper surface of the body of the second cervical vertebra (axis) and that serves as a pivot point for the rotation of the atlas (first cervical vertebra), enabling the head to turn. Also called the dens.
The pterygoid muscles (âwing musclesâ) are two jaw muscles located on the inner surface of the mandible. 1  Medial pterygoid muscle: originates from the pterygoid fossa and pterygoid process of the sphenoid. 2  Lateral pterygoid muscle: has two heads which lie almost horizontally to each other.unction. The pterygoid muscles are muscles of mastication and serve the movement of the temporomandibular joint. The contraction of the medial pterygoid elevates the mandible (jaw closure) and moves it forward (protrusion).