Wire color code chart
Try the lower help section on the Autozone web page. It can be a little difficult to stay on the FREE side of the help topics but if you only look up 12 times in a year for free then it is no cost. Otherwise there is a member fee. That said, be prepared to print the results for each search. You can get wiring diagrams that are either in color or identified by print stating the color of the wire, depending on source.
You would ask in the search for say wiring diagrams for your year and make, model of vehicle and then sort through the results. Some results are clustered with other makes or models of the same make. But investigate for the area of the car that you need and be careful it is the correct vehicle for each print.
Now you can also try the normal internet for your search. Also there are signal tracing tools for under $40 which throw a signal into a wire and have a second component which identifies the signal. Do not use through the gauges as they could burn out, just use it on the wires. These devices are at Lowes etc. and can be used for house wiring.
Finally remember that it is almost impossible to have identical wiring unless you visit a Salvage yard and get the wiring harness. For instance, orange with dotted blue or blue stripe, etc. Hope this helps.
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