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marpel

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Posted: 05/20/21 02:59pm Link  |  Quote  |  Print  |  Notify Moderator

A few years back I purchased, and installed, an after-market back up camera (tail gate) and dash-installed monitor (which includes a radio, phone and a GPS map system) for the truck.

The setup has worked flawlessly since that time, until a number of months ago, it started working intermittently, with occasional horizontal static type lines, which increased, then intermittent black screen (with camera not working notice on monitor), and now full black screen every time the vehicle is put in reverse (again same notice on monitor).

As we are likely heading out for a long trip (3000 miles) when/if the border closures lift, I would like to resolve this issue.

Even though I initially removed the old dash radio system and ran the new wiring, installed the camera and the new monitor, I actually know little about troubleshooting these types of systems.

So I am seeking help in this endeavour and any advice on how to determine if the issue is with the camera itself or wiring between the camera and head unit (the head unit still operates radio, phone and mapping system so my layman's mind suggests it is not with that end).

I also have minimal experience with multi meters and such, even though I do own one.

Any help is appreciated.

Marv

cooldavidt

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Posted: 05/20/21 03:18pm Link  |  Quote  |  Print  |  Notify Moderator

If there is power going to the dash unit then it really only can be the camera/wire input. Usually the camera wire and camera are wired together. With a plug.
The defect probably lies in that unit.

Can you buy a new camera/wire part?

David

marpel

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Posted: 05/20/21 08:42pm Link  |  Quote  |  Print  |  Notify Moderator

David,

Thanks for the response.

When you say the defect probably lies in "that unit", I presume you mean the plug?

The camera has a short (couple feet) wire which connects (by a very small plug) to a wire which runs under the truck and into the cab through the firewall. You may be correct about where the problem may lie, but I am hoping someone can give me some advice on how to determine if that, or another location, is where the issue is.

As to buying a new camera etc, the truck is getting close to end of life and will be replaced early 2022 (supply dependent, of course), so I was hoping to fix rather than replace at this point (unless it is unfixable and needs to be replaced).

Thanks again,

Marv

cooldavidt

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Posted: 05/20/21 10:19pm Link  |  Quote  |  Print  |  Notify Moderator

It is highly likely the flaw is in that wire.
What is the brand and model of your back up system

marpel

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Posted: 05/21/21 04:30pm Link  |  Quote  |  Print  |  Notify Moderator

It is an Advent OGM1 system.

I took a look at the wiring from the camera, "upriver" today. At the camera, the wiring seems to be firmly connected and no signs of wear, corrosion or other issues. I followed, and inspected, the wiring from the camera for about 5 or 6 feet and everything also looks OK. When I initially wired things, I went a bit overboard and taped everything as well as covered the wiring with two layers of split corrugated loom tubing, so it has been well protected and looks almost new.

As I indicated earlier, I am an electrical amateur and unsure how to determine if power, or a signal is present along the wiring route.

Marv

cooldavidt

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Posted: 05/21/21 07:18pm Link  |  Quote  |  Print  |  Notify Moderator

The wire between the camera and the main unit carries the camera signal only. The power comes thru another power wire attached to the vehicle electric system. From what you said there are only these two connections to the main unit.
Since the unit powers up it has power.
Since the picture is the problem the problem most likely lies in the camera itself or camera wire.
So next I’d like you to remove the camera and bring it close to the main unit bypassing as much wire as possible. If the wire has connectors take it apart there. If not cut it and strip it marking the ends with tape which you number so you can reassemble afterwards.
Where do you live?

* This post was edited 05/23/21 07:25am by cooldavidt *

shastagary

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Posted: 05/21/21 08:23pm Link  |  Quote  |  Print  |  Notify Moderator

the problem i see most often is water getting inside the camera from high pressure car washes or using a pressure washer at home. after a while of the camera being baked in the sun the seals go bad letting water in some have had luck opening them drying them out and using a sealant to reseal the camera housing

cooldavidt

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Posted: 05/23/21 07:30am Link  |  Quote  |  Print  |  Notify Moderator

There is a thread here dated Dec 11 2016 on how to do a reset.

That cannot hurt.

David

cooldavidt

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Posted: 05/23/21 09:00am Link  |  Quote  |  Print  |  Notify Moderator

https://www.gm-trucks.com/forums/topic/182677-advent-ogm1-stuck-on-splash-screen/

marpel

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Posted: 06/01/21 08:07pm Link  |  Quote  |  Print  |  Notify Moderator

Had to unexpectedly go out of town, so haven't been able to continue this thread until today.

Removed the camera and it's lead. The connector, camera and wiring show no signs of wear, moisture or corrosion. The connector (between the camera and the wiring to the cab) is quite small and it appears deep inside each is a 4-prong (like, real tiny) setup (male/female). The connection was/is tight.

To be sure, I cleaned off each connector, re-connected and put the truck in reverse. Same "Video Signal not Detected" message.

On the camera side is a single wire running from the camera to the connector, while on the vehicle side is a two wire set-up (red and black). This wire runs into the cab where it is plugged into a fuse box on the firewall. There is a wiring harness that then leads to the head unit. All wiring/fuses appear ok throughout the system. The camera picks up power through the box (not cut into the reverse light at the tail end).

If the 4-prong setup at the connector is any indication, the wiring in the camera end will be minuscule and a pain to cut into and splice farther up-stream to confirm if the camera is the culprit, so any suggestion on how to determine the condition of the camera without doing that would be appreciated.

As this system is no longer available, the only replacement I have found so far has completely different connectors and I am not sure of the compatibility to the head unit. And as there is a few hundred dollar cost, I would like to confirm exactly what/where the problem is before I go that route.

Marv

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