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Key off - non powered circuit?

Chris Lungstrass
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Chris Lungstrass Enthusiast

Chris Lungstrass

Posted
Posted

Good day all….trying to install a camera in my 2025 3500HD. Need a key off unpowered circuit. Been through the left and right fuse boxes and it seems all fuses remained powered. Let the truck sit for a bit to eliminate RAP circuits. Have not tried the engine compartment fuses as I don’t want run a wire though the firewall. What am I missing here?

 

Thanks for any suggestions!

 

Chris

 

2025 Duramax 3500 SRW

KTDanforth Enthusiast

KTDanforth

Posted
Posted

You might want to go with a units that attaches to the ODBC port.  I did go with thinkware units,  it has a lot of functionality when the vehicle is parked and monitors the battery voltage and lane drifting.

 

Anyway the ODBC direction might be a better way.

Ry Guy Enthusiast

Ry Guy

Posted
Posted

This thread will help:

 

 

Fuse F26 and that auxiliary power pin in picture on the passenger's side fuse box can be used as an ACC source. I used the aux pin for my seat heaters and dash cam.

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PBNB Enthusiast

PBNB

Posted
Posted

One other way to do this install is to start with the Upfitter kit. The additional fuse box allows for 4 of the switches to be on all the time or ignition controlled.

 

I just installed my Blackvue dash cam off this system and it works as expected. 

 

The challenge is going to be installing the upfitter kit which is a bigger job.

 

Running the camera off the ODBII port is a great idea but in my case, I have a Banks monitor plugged into the port.

 

KTDanforth Enthusiast

KTDanforth

Posted
Posted
9 hours ago, PBNB said:

One other way to do this install is to start with the Upfitter kit. The additional fuse box allows for 4 of the switches to be on all the time or ignition controlled.

 

I just installed my Blackvue dash cam off this system and it works as expected. 

 

The challenge is going to be installing the upfitter kit which is a bigger job.

 

Running the camera off the ODBII port is a great idea but in my case, I have a Banks monitor plugged into the port.

 

The ODBCII is a pass thru but the ODBC is needed for this device as it monitors your vehicles status, park mode, driving mode, low battery etc, but I get the point.

carkhz316 Enthusiast

carkhz316

Posted
Posted
On 5/19/2025 at 7:16 AM, Ry Guy said:

This thread will help:

 

 

Fuse F26 and that auxiliary power pin in picture on the passenger's side fuse box can be used as an ACC source. I used the aux pin for my seat heaters and dash cam.

This is the way. Its the same spot I used for both my dash cam as well as the turn-on signal for my underseat amp/ sub combo.

KTDanforth Enthusiast

KTDanforth

Posted
Posted
11 hours ago, carkhz316 said:

This is the way. Its the same spot I used for both my dash cam as well as the turn-on signal for my underseat amp/ sub combo.

Does this allow your vehicle cameras to monitor the surroundings when it is parked and turn off?

carkhz316 Enthusiast

carkhz316

Posted
Posted

Thats entirely dependent on the dash cam you use. For that feature, it would require a hot at all times feed, in addition to a switched ignition/ accessory feed as discussed above. For mine, it does have a "sentry" mode that has to be connected to B+, as well as the aforementioned ignition circuit.

  • 4 weeks later...
PBNB Enthusiast

PBNB

Posted
Posted

I parked the my truck after returning from at trip yesterday and left my dash cam switch turned on (by mistake). Tonight I noticed my dash cam was on so I turned it off. I am using AUX 2 for the dash cam and it can be configured to be hot all the time or controlled by the ignition. 

KTDanforth Enthusiast

KTDanforth

Posted
Posted
On 6/20/2025 at 10:29 PM, PBNB said:

I parked the my truck after returning from at trip yesterday and left my dash cam switch turned on (by mistake). Tonight I noticed my dash cam was on so I turned it off. I am using AUX 2 for the dash cam and it can be configured to be hot all the time or controlled by the ignition. 

 

Are you referring to the upfitters setup,  if so see below:

image.thumb.png.64ea6375307533813741c11e1791659c.png

PBNB Enthusiast

PBNB

Posted
Posted

@KTDanforth Yes, I have the dashcam hooked up to the AUX 2 switch. It is currently setup as "Always On". 

 

I noticed the camera was on as I passed by the truck at night. I am going to switch these to "Ignition Live" and just leave the AUX 2 button pushed. 

 

I don't want to kill the batteries!

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