2004 Chevrolet Trailblazer Car Radio Wiring Diagram (2024)

FAQs

Which wire is the memory wire on a radio? ›

Set your multimeter to the appropriate scale, connect the ground lead to a known good ground, and touch the other lead to each wire in the speaker wire. When you find one that shows approximately 12V, you have found the constant 12V wire, also known as the memory wire. It's yellow in most aftermarket head units.

Now turn the ignition on, then off; there should be no change. Also turn the headlights on and then off. If this wire stays at 12 volts then this is the correct wire for constant (yellow wire).

The 12 volt constant power wire is usually yellow or blue, though it may be a number of colors coming from the car.

The first step is to determine which ends of your speaker wire are positive and negative. For speaker wire with connectors, the positive is often red and the negative is black. Once that's done, connect one positive end to the positive terminal on your speaker and the other positive end to your amp or receiver.

US AC power circuit wiring color codes

The protective ground is green or green with yellow stripe. The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active. Three-phase lines are red, black, and blue.

If the vehicle you are working on had a radio, the existing “ignition” wire in the radio wiring harness will probably be red. This is the easiest way to get an “ignition” wire. In an older vehicle, you can tap into the red wire of cigarette lighter.

ACC wire is an essential circuit in the automotive electrical system, with its full name being "Accessory wire." It is a power supply line designed to provide electricity to the vehicle's accessory devices.

A simple standard electrical circuit has a black or red "hot" wire that carries power from the power source to the device (e.g., switch, fixture, outlet, appliance), a white neutral wire that carries the power back to the power source, and a green or bare copper ground wire that connects the device to the home's ...

The Key 1, Key 2, and Key GND wires will be used to interface steering wheel controls if your vehicle came equipped. Most newer vehicles will also need the Axxess ASWC-1 to translate the steering wheel controls to this stereo.

What color wires are in a car? ›

The protective ground is green or green with yellow stripe. The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active. Three-phase lines are red, black, and blue.