New head unit issues


Registered User
Hi there wonder if anyone can help me. Just installed a new head unit and now have 2 issues.
1. No rear speakers. After looking around on here and in other places easy option is an adapter, but I'm unsure which I need pc9-401 or pc9-404?
2. No radio. Do I need a certain adapter to power the aerial?
Also what is this connector for? Do I need to worry about it?

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Registered User
That went wrong. The aerial is allready plugged in I will take another picture of the whole back of the head unit.
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Registered User
If you have two there is a chance the better one is planted in you window screen. Little black box on the passenger side. It's common so try both to get radio working.