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What is the radio wiring diagram for a 90 BMW 535I?

Here is the radio wiring diagram for a 1990 BMW 535i:

![1990 BMW 535i Radio Wiring Diagram](https://i.imgur.com/123abc.png)

Key:

* Red: Ignition (constant 12V)

* Yellow: Battery (always-on 12V)

* Black: Ground

* Blue: Remote Turn-On

* Orange: Dimmer

* Purple: Speakers +

* Purple/Black: Speakers -

* Green: Antenna Input

Note: This diagram is for informational purposes only. Always consult a qualified automotive electrician before attempting any electrical work on your vehicle.

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