Its not free but if you want wiring diagrams and other information on your car check out the "Related Links" section below.
For about 25$ you get a year subscription for all the details for the car you pick. everything from wiring diagrams to torque specs for bolts. It won't have every little detail the manufactures might have but its close and worth it if you want to learn. Both programs were used by the automotive school i attended and are VERY helpful
You can find the Diagrams in a Helms or Chilton manual. Alternatively they are available online. See the Related Links.
I need 1998 Honda crv wiring diagrams
http://www.modifiedlife.com/1990-honda-prelude-car-radio-stereo-wiring-diagram/
Chilton's repair manual includes several wiring diagrams.
The easiest answer to this question is "www.installdr.com", there is a complete .pdf including diagrams on how to install the stereo for a 1992 prelude.
A clymer manual that is appropriate for your Honda model.
Try MOTORLIT.COM.
When changing spark plugs for the first time, a diagram comes in handy. A spark plug wiring diagram for a 1999 Honda Prelude can be found in its maintenance manual.
The IAT sensor on the 1993 Honda Prelude is located to the right of the intake manifold as you face the engine compartment. It is connected with red and green wiring.
This is a diagram or a technical drawing of the electric wires leading from the stator. In other words, it has to do with the electrical wiring harness of the stator, where the bike's electricity is produced in the engine. Such diagrams can be found online several of the internet forums and websites about the Honda Goldwing. Many Honda Goldwing owners have posted plans and diagrams of this and other parts of the Goldwing's electrical circuits.
You can find a 1990 Honda Civic SI wiring diagram in the car's owner's manual. You can also check with local auto stores.
In a Haynes 2001 Honda Spree repair manual, you will find wiring diagrams. The books include pictures and directions for getting the job done quickly.