coolant temperature sensor is the right of the coolant outlet line on the top of the engine when looking at while standing in front of the truck. it has a black two prong clip attached to the sensor. the oil temp switch is to the left of the coolant outlet line. it has a single black wire coming off of it.
It is under the alternator.
Autozone web page has the Vacuum diagram for the1989 Dodge Dakota.
behind the thermostat housing,two wires
I think it is near front grill in front of radiator
It is the two wire sensor next to the thermostat housing.
belt diagram 1992 dodge Dakota with 318
try here http://www.ebooksquad.com/search/97+dodge+dakota+wiring+diagram
You can get a 1990 Dodge Dakota fuse diagram in the owner's manual. You can also find it at select auto part stores.
Next to the thermostat housing, under and behind the alternator.
It is just to the passenger side of the thermostat housing.
It is important to have a diagram of the area of the car that is being worked upon. The cooling system diagram for a 1998 Dodge Dakota is found in its maintenance manual.
2006 Dodge Dakota - Where do i find the trailer wiring harness