Stereo Power Question

[foosed]

I was wondering if there was any way that i could somehow wire my stereo to stay on until the doors open after you shut the key off, like the newer vehicles do. I was thinking i could tap into the dome light switches on the door, but that would do just the opposite wouldnt it? My truck is a 72 k10 by the way. Just an idea i have been tossin around in my head, any input would be appreciated

[stich626]

they are on a timed module, that kills the lights,the dome light,radio alows you to open/close windows and all.. it surplies power to all assories untill door is opened or time runs out..
you can do the same thing(- timer) with the door switch and a relay.. use'n the switch as the relays ground, open door ground it lossed radio killed.. so you'll have 2 power sources for the radio.. you'll have to add a diode to the normal power so the relay doesn't backfeed the stock wire'n and fuse box

[Bad70sbchevy]

This website has the wiring diagram to do this. You'll just need some relays and some door switches. The diagram is about half way down the page. Hope this helps:

http://www.the12volt.com/relays/page5.asp

[motornut]

i put a switch in and it has 3 postions (right of radio)
up on with no key-wired to lighter
middle off
bottom with the key -wired to stock harness wire powered with key
Safer now i don't have to leave the key in for radio