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MODIFYING OR DETAILING YOUR I30 => ELECTRICAL | ELECTRONIC | AUDIO => Topic started by: Pharian on January 22, 2026, 01:28:50

Title: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: Pharian on January 22, 2026, 01:28:50

Hello,

I have a 2014 Hyundai i30 diesel which used to have an old GD-01 head unit. I replaced it with a second hand GD-03 head unit following the excellent instructions from this site.

I'm now trying to install an aftermarket reverse camera, but I'm having trouble with the wiring.

I have wired it to the reverse lights, and I have mounted it above the number place. I've run the cable up to the rear of the GD-03 head unit. I have then taken the active video wire from the yellow Video RCA connector on the reverse camera and connected that to the "A9 Reverse" wire on the main harness of the GD-03 head unit. I was hoping that would then kick off the camera when I put the car in reverse, but no joy.

The camera I have can be both PAL and NTSC. I have tried both but neither worked. The model camera is Gator G55CL. It has a standard yellow RCA "video out" type cable as well as positive/negative power (which I have connected to the reverse light).

Any suggestions would be greatly appreciated.

Are there more than one connection required into the main harness, other than the A9 pin?

Images of the wiring plan, the GD-03 head unit, and the instruction for the camera.

Title: Re: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: Pharian on January 22, 2026, 01:29:36

Image of type of GD-03 unit and back of Gator camera box.

Hope someone can help! Thanks

Title: Re: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: Pharian on February 03, 2026, 05:20:14

Anyone? Would love some help please if at all possible! Cheers

Title: Re: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: The Gonz on February 03, 2026, 10:12:43

Can't help you with connecting to a stereo. Mine is a mirror with invisible inbuilt reverse screen, so connecting to power from the overhead light cluster and to the reversing light was simple. I can recommend this if you can't solve the type you have.

Title: Re: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: Pharian on February 04, 2026, 10:37:25

Hi Gonz,

Thanks for the reply. Do you mean one of those ones that replaces the rear view mirror? So it doesn't connect to the stereo monitor screen?

I'm pretty keen to get the camera to connect to the stereo monitor if I can. Thanks for the response though!

Cheers

Title: Re: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: Pharian on March 03, 2026, 22:20:37

Anyone else able to help with this one perhaps please? Thanks! Anyone know the wiring required for the camera into the GD03 head unit for video camera input?

Title: Re: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: Quarrion on March 23, 2026, 04:30:47

That diagram is so confusing. Do you have anything you could plug the camera in to to confirm that it's working at all?
Next time I pull my head unit I'll get some photos of the cabling to check with.

Title: Re: Install aftermarket reverse camera into GD-03 head unit wiring
Post by: Quarrion on March 23, 2026, 22:27:43

Just came across this post again where someone was wiring up a camera:
reverse camera cable (https://i30ownersclub.com/index.php?topic=50704.msg465470#msg465470)
A bit of a different situation but they wired an adapter because the voltage for the camera was different, 6v instead of 12v. Could that be an issue with yours?