Hi,
I'm still trying to get to the bottom of why my RCD510 will only power on when the car is ticking over. It wont power on if the key is in the ignition and as soon as the ignition is turned off the head unit switches off.
I think I have found the answer, but I wanted to check with others before I start cutting cables. I have a Parrot SOT cable connected to the back of the rcd510, from the info I have found the SOT cable has a 12 volt feed into both pins 15 (+UB) and 16 (Safe/Code). However, the pin into 15 is a Permanent 12v feed while the pin into 16 is +12v Ignition.
I assume that this is the cause of the unit only powering on when the car is ticking over?
Rich