A/C High Pressure Switch (Diesel) Connector End View

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

A/C HIGH PRESSURE SWITCH (DIESEL) - GRAY 2 WAY

Courtesy of DAIMLERCHRYSLER CORP.
CAV	CIRCUIT	FUNCTION
1	C18 20DB	A/C PRESSURE SIGNAL
2	C21 18DB/OR	A/C LOW PRESSURE SWITCH SIGNAL