I'm thinking that my problem also fits into this post... so i will ask... lol
I also have a aftermarket Kenwood deck that i hooked up myself into my '89 ranger (without the wiring harness). My deck doesnt seem to turn off when it gets too loud other than when my sub is pounding too hard and it turns off everything. I'm thinking that that is just due to taking too much power as i dont have a cap or anything, but if i turn it REALLY loud then i can see the voltage meter on my dash pouncing to the bass
But sometimes when i go to change the song or something, instead of changing songs, it just turns off. The song keeps playing, but all the lights on it turn off and it takes a few seconds to put back on the screens display. Then when i do it again it would usually do it again and again. This only happens every once in a while and i think i have linked it to when i just get into the car and the cars still cold. But im not completely sure on this. I'm pretty sure it hasnt dont this while im driving or anything like that lol
Anyone ran into this? I just assumed it was the deck because i bought it used