I have a 2005 E350 cargo van, and I would like to hard wire a dash/drive camera. I was going to tap into the cig lighter socket, but it seems that they are always on, even when the van is shut off and key is out of ignition?

Is there a power source that is ignition controlled?

 

Would you believe me if I told you Ford electrical systems do not like add on's especially those controlled by the key switch.
In order to keep extraneous voltage fluctuations away from the PCM, I would suggest you wire it directly from the lighter circuit with a separate properly fused on/off switch.

 

there are 2 types of wiring, one is wire to your batt where it continuous suck your batt, the other is wire to your ignition where it will shut off when the engine shuts off. and also, if you are using finevu cr300 or other cameras with powermagic, it basically stops power supply once it detects the batt's voltage drops below a certain limit. if your camera has motion detect functionality, you can also use it so as to not consume that much batt.

Dashcam industry changes rapidly, you can have a search for the latest ones and have a try.

Check out szswill.com for dashcams..