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Old 10-08-2019, 04:14 AM  
timurrrr
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Got my DDX918WS installed in my '17 BRZ recently using the Carbon Car Systems harness and, as many have reported on the DDX917WS thread, my backup camera didn't work.

Quote:
Originally Posted by wolffbite View Post
I have the carbon harness as well, but my issue was with the backup cam. They were adamant the 6v/12v converter was not required but my camera did not work until I got a local shop to inspect the harness and add a converter.

I would not be surprised if the issue is with your harness.
In fact, for me the camera did work when the engine was off, but was showing a black screen when the engine was running. It caused me a few WTFs and re-doing the installation a few more times than I should have. I eventually figured it had something to do with the voltage: when the engine was off and the voltage was in the 10–12V range the camera worked, but at 14V it would stop working.

Having done a little more research and with help from my friend (I know you're reading this — thank you again!) we've inserted a PAC VOLT-39 (available on Amazon) set to 6V in between the head unit and accessories harness — and now everything just works!

Since I know how frustrating it can be to deal with this, I've decided to share the details of what we did. You should be proficient with a soldering iron, and have everything needed for soldering readily available. Also, no guarantees that it will work for other MYs — use your own judgement/intuition and be prepared to improvise.

1) Find the camera/accessory power and ground on the 28-pin connector on the CCS harness and the red and black wires connected to those pins. You might find this post with pin out table for MY16 useful.

Here's how it looked on my harness:


2) Undo the cloth insulation around the cables leading to the connector to have at least 2 inches of cables exposed.

3) Cut the power and the ground wires in the middle of the exposed area and solder the VOLT-39 cables like this:
- VOLT-39 black cable to harness ground (Y-shaped connection)
- VOLT-39 red (~12V power in) and blue (trigger) cables to the head unit side half of the harness red cable (Y-shaped connection)
- VOLT-39 red-and-white (6V power out) cable to the connector side half of the harness red cable

Like this:


Minor correction: now that I know the result, I'd solder the VOLT-39's black cable the other way around so that it has a bit less mechanical stress when the VOLT-39 itself is taped to the harness. Not a big deal though.

4) Enjoy!
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