that's how ALL aftermarket car electronics work.I thought the HU main 12V switched power wire (red) was being connected to the "S-Contact" wire in the procedure? Does the HU get its main power from the unswitched (yellow) lead and only use the 12V switched one as a control signal?
yesAaaaaahhhhhh, I didn't know that! Thanks :thumbup:
Now the piggyback on the 25A wiper fuse makes a lot more sense since its not main power.
So if I tap the S-contact wire for 12V switched on my new Kenwood X590 it should,
1) stay on until I remove the key after turning off the engine, and
no. no aftermaret radio with the exception of a few Blaupunkts will do this. it's a function of the radio, not the car. But it's STILL worth tapping the s-contact if for no other reason than number 1.2) turn on like the stock HU when no key in the ignition.