AutoZone has most of the diagrams that you will need.
yes 1987-1994 will work
A free copy of a fuse box diagram and wiring diagram for a 1991 Dodge Dakota truck can be found at the local library. Look for books about automotive repair that are specific for that vehicle.
Haynes Manual
Try MOTORLIT.COM.
A wiring diagram, for a 1991 Pontiac Firebird, can be obtained from most General Motors dealerships. The wiring diagram can also be found at most auto-parts stores.
go to oreillys and buy a chilton book for your vehicle wiring diagram is in it
You can find the wiring diagram for a 1991 Suburban at various auto part stores. You can also check in the owner's manual.
When you pop the pannel off to access the Fuses there will be a sticker on that pannel with what fuse goes where and how many Amps that fuse needs to be.
Try PAINLESSWIRING.COM. They will help you with the wiring if you have any problem.
You can find the radio wiring diagram for a 1991 Ford Bronco in the vehicle's owner's manual. You can also find it by contacting the radio manufacturer.
The manual.
You can find wiring diagrams for this vehicle at www.autozone.com.