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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Alpine Double Din to optimill reverse camera set up help
I’ve got power to the camera, and continuity on the signal cable however I get no image on the screen. If I select reverse, I’m getting 12V on the reverse signal cable but nothing happens at the head unit. If I press the Cam button on the head unit it just makes a bong noise and still no image. Any thoughts?

Can anyone confirm which pin the reverse signal is supposed to go into on the connector on the back of the HU?
Post #961525 13th Aug 2022 12:30pm
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Angus_Beef



Member Since: 30 Apr 2015
Location: Oslo
Posts: 434

Norway 2015 Defender 110 Puma 2.2 SW Corris Grey
Check the head unit wire that grounds to the handbrake switch Roaming around 🇳🇴🇨🇭
Post #961530 13th Aug 2022 3:01pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Cheers Angus. Can you expand on that? I haven’t got the handbrake wire wired up, is this a necessity? Is there a workaround to save me having to run more wires in?

Cheers
Col
Post #961531 13th Aug 2022 3:08pm
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Angus_Beef



Member Since: 30 Apr 2015
Location: Oslo
Posts: 434

Norway 2015 Defender 110 Puma 2.2 SW Corris Grey
I have the JVC that mud sells and it has a wire to connect to a handbrake that needed to be grounded before the camera would work. I grounded this wire to the unit instead of hooking it to the switch because I wanted everything to work regardless of parking brake position .

I’m not sure if your particular unit is the same, but with mine the camera did not work with that particular line not connected to a ground Roaming around 🇳🇴🇨🇭
Post #961534 13th Aug 2022 3:25pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Cheers Angus, I’ll give it a go.
Post #961535 13th Aug 2022 3:26pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Sorry, just to clarify, all I need to do is connect that wire to ground?
Post #961537 13th Aug 2022 3:28pm
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Angus_Beef



Member Since: 30 Apr 2015
Location: Oslo
Posts: 434

Norway 2015 Defender 110 Puma 2.2 SW Corris Grey
Well I don’t have the alpine unit so I can’t say for certain. But in your trouble shooting, check to see if there is a line for the parking brake, and what signal the unit expects on that line Roaming around 🇳🇴🇨🇭
Post #961539 13th Aug 2022 3:40pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
There is a parking brake line, but not sure whether it wants 12V or 0V. I tried grounding it to no avail. Worth connect it to 12V or do I risk booting something?
Post #961540 13th Aug 2022 3:43pm
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MichaelE



Member Since: 18 Jan 2020
Location: Crawley West Sussex
Posts: 155

England 
Not saying this will fix your problem but you may want to do an Ebay search for "parking brake override bypass". You'll find them for a range of units and Alpine are amongst them. It allows access to menu items that are unavailable if the unit does not get a handbrake on ground signal.
Post #961541 13th Aug 2022 3:43pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3604

United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Problem solved. Turns out you have to enable the camera in settings!!!!
Post #961543 13th Aug 2022 3:52pm
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Angus_Beef



Member Since: 30 Apr 2015
Location: Oslo
Posts: 434

Norway 2015 Defender 110 Puma 2.2 SW Corris Grey
Good result!! Roaming around 🇳🇴🇨🇭
Post #961561 13th Aug 2022 5:42pm
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