What are the colors for negative and positive speaker wire on a 1993 ford ranger pickup truck?

There's no single standard color code for speaker wires in a 1993 Ford Ranger. The colors used can vary depending on the factory stereo system installed, aftermarket additions, and even the specific trim level of the truck.

To find the correct positive (+) and negative (-) wires for your speakers, you'll need to:

* Consult a wiring diagram: A factory service manual for your specific 1993 Ford Ranger will have the most accurate wiring information. These are often available online (for a fee) from sites specializing in automotive repair manuals.

* Use a multimeter: A multimeter can safely test the voltage at each wire. With the radio on, a positive wire will show a voltage reading when the speaker is active. A negative wire will usually show ground (near 0 volts) or a voltage opposite the positive wire. Always disconnect the battery's negative terminal before working with the wiring.

* Trace the wires: Carefully follow the speaker wires from the speaker back to the radio harness. This can be time-consuming and sometimes difficult due to the routing.

Without a wiring diagram or careful testing, guessing the color code is risky and could damage your stereo or speakers. Use the multimeter method described above; it is the safest and most reliable method.