Master cylinder. Located on the firewall, driver's side, in front of the brake booster.
Near the battery attached to the round brake booster.
The fill plug is in the center rear of the case.
On the firewall, in front of the booster, on top of the master cylinder.
Fill plug is located on the center rear of the transfer case
No
In my 1989 Dodge Dakota the brake light is on fuse number13 it is a 5amp it also goes to buzzer, speed control, check engine light, anti-lock warning light, and other things page 12-19 Haynes 1987- 1993 Dodge Dakota Repair Manual
Dodge Dakotas do not, and have never, had transaxles.
To add brake fluid to a 1989 Dodge Spirit, locate the brake fluid reservoir, which is typically found near the back of the engine bay on the driver's side, just behind the master cylinder. The reservoir is usually a translucent plastic container with a cap labeled for brake fluid. Ensure the vehicle is on a flat surface, remove the cap, and add the appropriate type of brake fluid until it reaches the recommended level marked on the side of the reservoir. Remember to securely replace the cap after adding fluid.
in front of steering wheel in engine compartment ( two small caps on rectangular block )
A 1989 Dakota has throttle body fuel injection.
Transfer case gets ATF (auto trans fluid) Axles get 75w90 or 80w90 gear oil.
Autozone web page has the Vacuum diagram for the1989 Dodge Dakota.