I'm going to install a backup camera in the bumper. Is there any good 12v supply back there besides the backup lights, or do I need to string up one?

I want the camera to be on whenver the key is on accessory/run.

Thanks

 

You can use the trailer plug, using the trailer charge circuit.

 

Thanks. Is that lead on the 4pin trailer harness? That's what I have.

 

no that is on the 7 pin connectors. I think you can find the harness up under the bed thought. Get a multi meter and probe around see if you can find a 12v key on source.