OEM Navi Bypass

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Originally Posted by Rick

You've probably already read about this but most aftermarket NAV systems have a wire that goes to the brake. If you ground this wire to the firewall instead it fools the system to allow you to program it on the fly.

Not true for the AVIC Z1, earlier models took a flasher module built wired into the illumination wire, newer models require a wire to be added. But, the lockout features can be bypassed.