Quote:
Originally Posted by crystalworks
Ob, in the case where you want it powered all the time, just use a switched 12v on ignition to trigger a relay to power the camera. You will have to determine if your head unit switches to reverse automatically using the bus as crowz mentioned. If it does, great. The camera will be feeding it a picture all the time whether in reverse or not so your wiring would be done.
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Camera load is minimal enough that a relay should not be needed. I think the one Crowz and I are using draws less than 250mA. A fuse for sure to protect the wiring in case of a short in the camera itself or on the wiring running through the tailgate.