Mazda CX-9 This larger SUV adds a V6 option, as well as more cargo room, to the CX-7 option.

Switched ignition power at back of 2022 cx9

Old May 31, 2025 | 06:47 PM
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Default Switched ignition power at back of 2022 cx9

I am installing a backup camera on my trailer and want to run the power to it on the 7pin connection I put on my cx9. I want to have it be switched and not always hot from the plug on passenger side in back.

From the wiring diagrams it appears there is a switched source, but I can't figure out what wire it is on which harness.

Can someone point me to where one would be back there?

I did search this forum and my searchfoo failed.

thanks.
 
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Old Jun 2, 2025 | 04:46 AM
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Is there a 12v cigarette lighter ( AUX) socket in the back?
 
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Old Jun 3, 2025 | 09:16 AM
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Originally Posted by grim_reaper
Is there a 12v cigarette lighter ( AUX) socket in the back?
There is that, but it isn't switched. When parked and not running I would have to unplug the trailer to not always have the camera on. Not a huge drain, but there are times it may sit for months hooked up and not running. The camera only needs to be on when the vehicle is on.
 
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Old Jun 3, 2025 | 10:51 AM
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You could get an accessory OBDII diagnostic cable connector and use the switched power terminal. This way you will not splice into any of your OEM wires. You do need to check the OHM requirement of your accessory because you may need to install a power relay. This is the easiest and safest way to do what you want.
 
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Old Jun 4, 2025 | 05:55 PM
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Originally Posted by Callisto
You could get an accessory OBDII diagnostic cable connector and use the switched power terminal. This way you will not splice into any of your OEM wires. You do need to check the OHM requirement of your accessory because you may need to install a power relay. This is the easiest and safest way to do what you want.
I could, but then have to run from the front to the back. Looking for something on a connector already at the back.
 
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