What is the correct wire by color to hook up a yellow memory for CD player in 1988 Chevy Celebrity?

There's no standard color code for car audio wiring across all manufacturers, and especially not for a specific memory wire in a 1988 Chevy Celebrity. The color of the wire for the memory function (which would keep radio presets after the car is turned off) can vary wildly depending on how the car's wiring harness was assembled at the factory or if any modifications were made since.

You cannot rely on color alone. Attempting to connect based on assumed color codes risks damaging your car's electrical system or your radio.

The Safe Approach:

1. Consult your car's wiring diagram: This is the most reliable source. Your owner's manual *might* have a simplified diagram, but a more detailed wiring diagram for your specific year and model Chevy Celebrity is usually available online (often on sites specializing in car repair manuals) or from a parts store. Look for the radio wiring section.

2. Use a multimeter: A multimeter is an inexpensive tool that can identify the purpose of wires. With the car's ignition off, you can test for continuity or voltage to identify the memory wire. The memory wire will have a constant 12V when the ignition is off. (Be careful not to short anything!) This requires a basic understanding of how to use a multimeter safely.

3. Wiring harness adapter: Many aftermarket car stereos come with wiring harnesses that adapt to the car's wiring. This simplifies the connection process significantly.

Warning: Incorrect wiring can damage your CD player, your car's electrical system, or even cause a fire. If you are not comfortable working with car electrical systems, it's best to have a qualified mechanic or car audio installer handle the installation.