The starter solenoid is built onto the starter itself. It is a dual action solenoid applying energy (12 volts) to both the starter and the Bendix. There is also a starter relay located on the fender well just beneath the left hood henge. In addition to this, will be a manual type switch controlled by a push-rod from the ignition key switch. this unit is located on the steering column under the dash and applies energy to the start relay, which energizes the starter solenoid, Bendix and the starter itself.
At the base of the engine you will find the starter.
Try Ebay.
it is not a 350 dodge makes the 360 5.9
On the valve body, inside the transmission.
on line
On the valve body. Its called 3/4 shift solenoid some times.
It is inside the trans, on top of the valve body.
A 24 valve in a 1999 does not have an external shut off solenoid. It is internal to the injection pump.
incorparated in the pcm
You can find a vacuum line diagram for a 1989 Dodge Dakota by checking the owner's manual. You can also find them at different auto part retail stores.
Try e-Bay.
In a motor manual for same vehicle.