Dakota 4WD V6-239 3.9L Magnum (1996)
Oil Pressure Gauge: Testing and Inspection
Actual engine oil pressure should be checked with a test gauge and compared with gauge readings prior to performing gauge diagnostic procedures.
1. Place ignition switch in On position, then disconnect sending unit connector and observe gauge. Needle should move to or remain at low end of
scale.
2. Connect a jumper wire between cavity 1 of sending unit connector and ground and observe gauge. Needle should move to high end of scale.
3. If gauge performs as specified, replace sending unit; if not, proceed as follows:
a. Remove jumper wire and place ignition switch in Off position, then disconnect battery ground cable and remove instrument cluster and bezel.
b. Disconnect gray connector from righthand side of cluster, then probe connector cavity K for continuity to ground. If continuity exists, repair
short as necessary; if not, continue with procedure.
Fig. 5 Oil Pressure Sending Unit Connector Terminal Identification
c. Check for continuity between cavity 1 of sending unit wire connector, and gray cluster connector cavity K. If continuity exists, replace oil
pressure gauge; if not, repair open circuit as necessary.
