When you open the car door... basically under the steeringwheel theres a panel giving access to the fuse box.
www.autozone.com may help
To install a radio you need a wiring harness for a 1994 Dodge (a Metra 80-1817 from Circuit City is what I used), and an installation kit (make sure it fits a 1994 Dodge Spirit). You'll probably need to splice the wires from the wiring harness to the stereo harness unless you can get find the right kind of connection somewhere.
The fuel pump relay on a 1994 Dodge Spirit is typically located in the power distribution center (PDC), which is situated in the engine compartment. You'll find the PDC near the battery, and the relay is usually labeled on the cover for easy identification. If you have trouble locating it, consulting the vehicle's service manual can provide specific details and diagrams.
description of fuses
in the owners manual or on the back of fuse cover
where can you find a website for free diagram of tail light wiring on a 1994 dodge 1500 truck?
You will have to find the coil first.
Under the hood you should find a sticker with the information your looking for. The sticker is usually stuck on a A/C component such as the compressor or the receiver dryer.
All fuses are under the hood, next to the battery.
AutoZone has most of the diagrams that you will need.
in the glove compartment, and the relays are under the tray in the glove compartment
I don't believe it had a fuse panel, but you may find some inline fuses.