Rear Camera Stopped working

[HardTrvln]

2011 Winnebago Journey 34Y. Rear camera stopped working - "NO VIDEO" (sic) message on monitor. Both side cameras are working. Voltage at the rear camera measured 8.5 volts. I tested the camera by directly applying 12-V, and the camera sent video to the monitor. I assumed that 12 volts is required and replaced the camera switch (Riverpark CVS-100-03). No change - rear camera still doesn't work. However, the circuit diagram provided with the new switch shows 9 volts (Not 12-v) are sent to each of the 3 cameras. It seems reasonable that 9-V would drop to 8.5-V through the 50-Ft cable between the switch and the rear camera. Can anyone tell me how to fix this problem?

HardTrvln
Larry, Jeanne, and Pico
2011 Winnebago JourneyExpress 34Y
2020 Buick Envision
Casa Grande, AZ

[Domo]

Always carry a meter (d'Arsonval movement is best), crimpers, CRC contact cleaner and lubricant and dielectric grease when troubleshooting. You rig is 11 years old - corrosion and old crimps are the most likely cause of failures based on my experience with out 14 year old MH. Always remove plugs and spray the contact surfaces and then reinsert several time to break up crud. Always re-crimp any butt or spade connectors in the pathway. Always apply a dab of dielectric grease to the contact points to help block new corrosion. Meanwhile.. regarding you issue.

I'd switch the inputs at the monitor to verify it's not the monitor or the immediate cable connection point at the monitor. If you see any crimped connectors - such as for power to the external cameras, re-crimp them or replace them. Of course, feel free to use the CRC!

Using your trusty meter, verify what voltage is actually being sent out to each camera.

Let us know what those couple of steps do so we can help further, if need be.

[HardTrvln]

Thanks for your reply, Domo.
The monitor input from the camera switch is used to display video for both side cameras. Video for both side cameras is displayed OK, but rear camera video is not displayed. I believe this this connection is OK.
I checked the voltage at the rear camera (8.5-V), which doesn't seem low considering 9-V from the switch through a 50-Ft cable. I have been unable to find specifications for the rear camera to determine if 8.5-V is too low for the camera. Does anyone have information for the camera used by Winnebago? All I have found is the Winnebago part number, but no specs.

[Domo]

All the cameras probably have the same specs and may have the same plugs behind the monitor. Can you switch the rear camera cable to one of the side cameras and see if it then works with a good display? Believing a connection is good seldom brings home the bacon if you know what I mean...

Of course you can also connect one side camera cable to the current rear cable input to the monitor.

I'm trying to help determine if it's simply a dirty plug where the rear camera plugs into the system...

What's the model number of the monitor - or a picture of where the cameras plug into it's backside would help.

[HardTrvln]

I connected the rear camera cable to a side camera plug on the camera switch module and got the "NO VIDEO" message when it was selected with the turn signal.
I believe the connection between the switch and the monitor is good BECAUSE there is only one connection and it works for both side cameras. The circuit diagram for the camera switch is provided below to clarify my description.

[Domo]

Good! So we know it's not just the monitor with a faulty rear camera socket. Definitely the rear camera cable or the camera.

Have you used CRC contact cleaner and lubricant on both ends of the rear camera cable? (I'm hoping the cable has a plug at the camera end.)

I'm still hoping for a corroded power connection - sometimes camera only come with a 5, 10, 15 foot cable - for longer runs they may have used an extension - so there could be a coupling somewhere in the line causing the drop you've seen.

If you can get a part number off the rear camera it might specify how long it's integral cable was and you'd know if it needed an extension.

I'll keep my fingers crossed.

As a last resort you could permanently wire an "ignition on" 12 source to the rear camera and abandon the 9V (8.5) from the monitor... You've already proved that works...

[Lowflyer1]

Originally Posted by Domo

Good! So we know it's not just the monitor with a faulty rear camera socket. Definitely the rear camera cable or the camera.

Have you used CRC contact cleaner and lubricant on both ends of the rear camera cable? (I'm hoping the cable has a plug at the camera end.)

I'm still hoping for a corroded power connection - sometimes camera only come with a 5, 10, 15 foot cable - for longer runs they may have used an extension - so there could be a coupling somewhere in the line causing the drop you've seen.

If you can get a part number off the rear camera it might specify how long it's integral cable was and you'd know if it needed an extension.

I'll keep my fingers crossed.

As a last resort you could permanently wire an "ignition on" 12 source to the rear camera and abandon the 9V (8.5) from the monitor... You've already proved that works...

I would not start meddling with back yard mechanics to 12V when the print shows 9V. There is a reason the Power Supply drops the voltage from 12 to 9V.
If the camera is designed for 9V, 8.5V should be well in the tolerance zone.
Different cameras & systems work on different voltages. Some of ours were 6V. Sure they work with higher voltages but for how long?

Unless all the cameras are the same part #, they are different. Just looking at the print, they are most likely different. I would suspect the rear camera is bad.

All the cameras I worked on had a 5-12" pigtail depending on application.

[Domo]

Originally Posted by Lowflyer1

I would not start meddling with back yard mechanics to 12V when the print shows 9V. There is a reason the Power Supply drops the voltage from 12 to 9V.
If the camera is designed for 9V, 8.5V should be well in the tolerance zone.
Different cameras & systems work on different voltages. Some of ours were 6V. Sure they work with higher voltages but for how long?

Unless all the cameras are the same part #, they are different. Just looking at the print, they are most likely different. I would suspect the rear camera is bad.

All the cameras I worked on had a 5-12" pigtail depending on application.

Thanks for your caution... Hence, the hope for the part number on the backup camera so the specs/configuration can be verified, and the LAST resort being wiring to 12 V.

I agree, one of the following components are suspect; camera and pigtail, connections to an extension cable, extension cable and terminal plug at the monitor. It is likely that OP may need to replace the entire rear camera system.

On an 11 year old rig I suspect bad connections first - it'll be interesting to find out.

OP - can you remove the camera and possibly hook it through a side camera cable?

[basketball]

My camera is a sony and went bad. Gave it a tap and it come on. I have replaced it once already.
Took camera out and on back had model of camera. Google it and you will find repair shop.
Try the tap first.

[basketball]

It is a 8 volt camera.