Manual. Get one.
here http://pdftown.com/Subaru-Impreza-1999-Wiring-Diagram.html
which wiring schematics do you need?
You can find a wiring diagram for a 1999 Chrysler 300m in the vehicle's owner's manual. You can also find it at various auto parts stores.
== ==
You can find the wiring diagram for a Hyundai Accent 1999 at various auto part stores. You can also check the vehicle's owner's manual.
Check your owners manual, usually in your glove box. If you can't find it, try to find a manual for your car at Autozone, or Advance Auto Parts. Hope that helps!
try Haynes.com
You can find a 1999 Chevy Tahoe engine fuse block wiring diagram in the car's owner's manual. You can also find it at most auto part stores.
A person can get a wiring diagram for this car as a print out at an auto store. They can also find the wiring diagram in the maintenance manual of this vehicle.
try your local library
You can get the wiring diagrams for the 1999 Chevy C1500 truck online at places like AutoZone and Modified Life. You can also find the wiring diagram at Auto Parts Warehouse.
You can find a 1999 Chevrolet Corvette radio wiring diagram in a Corvette service manual. The service manual can be found at your local library. Most Chevrolet dealerships will provide the radio wiring diagram free.