Upgrading your radio to a 2005 and newer style radio.
This article describes installing a 2005 and up radio into a 1987 Dodge Daytona, I assume that these instructions will work on all 1984 to 1989 models, but I have not tried this in a newer (1990 – UP) car. These new radios are much more powerful (66 Watts), and offer many more features than even the newest flat faced radio from the late 90’s. They are also much closer in shape to the original radio, rather than being curved like the oval face radios from 1999-2004, so they fit a lot better as well.

1. Check Radio Compatibility
Newer Chrysler radios use the Chrysler Accessory Network Bus (CAN bus) to turn the radio on and off instead of the standard ignition fed trigger wire in older cars. Some new style radios are backward compatible with the trigger wire, so you will need to find a radio that is compatible. The following list shows radios that are known to work with the trigger wire and ones that are known to not work.

Known Working:
REF: Single CD with aux input (This article is based on this radio)
RAQ: 6 CD changer

Known NOT Working:
RAK: 6CD with Tape (Besides requiring the CAN bus, it will not physically fit in the opening.)

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Front of the model REF Radio

Close up of the rear of radio