<strong>C-101 Connector</strong><br />OK, you got us. This one only exists in two or three years of the XJ and MJ. It can be found in '87-'89 vehicles, so it's not really pertinent to most of us, nor is it really a sensor. That said, it is evil. Pure evil. When the Frenchies designed this thing, they had nothing in mind except the torture of future generations of Jeep owners. It is found on the driver side of the engine compartment and high up on the firewall. All the wires coming out of the interior go into one side of this, while the other side goes out to the body and engine. In theory, it made it easier to assemble the wiring harness in the vehicle. In practice, it is the devil! The connectors become fouled with road debris, oil, and other contaminants - not to mention the metal bolt holding the plastic part together. If you know someone with this and they ever have any problems with the Jeep running, suggest they jiggle the C-101 connector.